Contact

Dr. Stephan Winnerl

Head Spectroscopy
s.winnerlAthzdr.de
Phone: +49 351 260 3522

News

6-7.07.2023 | FWIH retreat has taken place in Neukirch/Lausitz

05.07.2023 | Our paper about pump-probe spectroscopy of BaFe2As2 under high pressures and low temperatures has been picked as an Editors' Suggestion.

09.06.2023 | FWIH reunion of present and former members

orangener PfeilBachelor, Master, and Doctoral Theses

We are continuously looking for students to join our topics. If you are interested, please get in touch with the contact person listed or with Dr. Stephan Winnerl.

orangener PfeilFWI-Wiki

Recent Publications by FWIH

2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006

2024
  • F. Bernhardt, S. Gharat, A. Kapp, F. Pfeiffer, R. Buschbeck, F. Hempel, O. Pashkin, S. C. Kehr, M. Rüsing, S. Sanna, L. M. Eng
    Lattice Dynamics of LiNb1–xTaxO3 Solid Solutions: Theory and Experiment
    Phys. Status Solidi A 222, 2300968 (2024)
  • T. Venanzi, M. Cuccu, R. Perea-Causin, X. Sun, S. Brem, D. Erkensten, T. Taniguchi, K. Watanabe, E. Malic, M. Helm, S. Winnerl, A. Chernikov
    Ultrafast switching of trions in 2D materials by terahertz photons
    Nature Photonics 18, 1344 (2024)
  • R. A. Mayer, L. Wehmeier, M. Torquato, X. Chen, F. H. Feres, F. C. B. Maia, M. Obst, F. G. Kaps, A. Luferau, J. M. Klopf, S. N. Gilbert Corder, H. A. Bechtel, J. C. González, E. R. Viana, L. M. Eng, S. C. Kehr, R. O. Freitas, and I. D. Barcelos
    Paratellurite Nanowires as a Versatile Material for THz Phonon Polaritons
    ACS Photonics 11, 4323 (2024)
  • A. Luferau, M. Obst, S. Winnerl, A. Pashkin, S. C. Kehr, E. Dimakis, F. G. Kaps, O. Hatem, K. Mavridou, L. M. Eng, M. Helm
    Hot-Electron Dynamics in a Semiconductor Nanowire under Intense THz Excitation
    ACS Photonics 11, 3123 (2024)
  • D. Hilliard, T. Tauchnitz, R. Hübner, I. Vasileiadis, A. Gkotinakos, G. Dimitrakopulos, P. Komninou, X. Sun, S. Winnerl, H. Schneider, M. Helm, E. Dimakis
    At the Limit of Interfacial Sharpness in Nanowire Axial Heterostructures
    ACS Nano 18, 21171 (2024)
  • T.W.J. Metzger, K.A. Grishunin, C. Reinhoffer, R.M. Dubrovin, A. Arshad, I. Ilyakov, T.V.A.G. de Oliveira, A. Ponomaryov, J-C. Deinert, S. Kovalev, R.V. Pisarev, M.I. Katsnelson, B.A. Ivanov, P.H.M. van Loosdrecht, A.V. Kimel, E.A. Mashkovich
    Magnon-phonon Fermi resonance in antiferromagnetic CoF2
    Nat. Commun. 15, 5472 (2024)
  • H. Shiravi, A. Gupta, B. R. Ortiz, S. Cui, B. Yu, E. Uykur, A. A. Tsirlin, S. D. Wilson, Z. Sun, and G. X. Ni
    Plasmons in the Kagome Metal CsV3Sb5
    Nat. Commun. 15, 5389 (2024)
  • M. Wenzel, E. Uykur, A. A. Tsirlin, S. Pal, R. M. Roy, C. Yi, C. Shekhar, C. Felser, A. V. Pronin, M. Dressel
    Intriguing low-temperature phase in the antiferromagnetic kagome metal FeGe
    Phys. Rev. Lett. 132, 266505 (2024)
  • B. Shen, V. A. Ginga, A. M. Arevalo-Lopez, G. Garbarino, E. Uykur, M. V. Goncalves-Faria, P. K. Mukharjee, P. Gegenwart, A. A. Tsirlin
    Magnetic versus nonmagnetic polymorphs of RuBr3 under pressure
    Phys. Rev. B 109, 224402 (2024)
  • X. Sun, A. Pashkin, F. Moebus, R. Hübner, S. Winnerl, M. Helm, E. Dimakis
    Separated Electronic and Strain Interfaces in Core/Dual-Shell Nanowires: Unlocking the Potential of Strained GaAs for Applications Across Near-Infrared
    Adv. Funct. Mater. 34, 2400883 (2024)
  • M. V. Gonçalves-Faria, A. Pashkin, Q. Wang, H. Lei, S. Winnerl, A. Tsirlin, M. Helm, E. Uykur
    Coherent phonon and unconventional carriers in the magnetic kagome metal Fe3Sn2
    npj Quantum Mater. 9, 31 (2024)
  • M-J. Kim, S. Kovalev, M. Udina, R. Haenel, G. Kim, M. Puviani, G. Cristiani, I. Ilyakov, T.V.A.G. de Oliveira, A. Ponomaryov, J-C. Deinert, G. Logvenov, B. Keimer, D. Manske, L. Benfatto, S. Kaiser
    Tracing the dynamics of superconducting order via transient terahertz third-harmonic generation
    Sci. Adv. 10, eadi7598 (2024)
  • S. Regensburger, F. Ludwig, S. Winnerl, J. M. Klopf, H. Lu, H. G. Roskos, S. Preu
    Mapping the slow and fast photoresponse of field-effect transistors to terahertz and infrared radiation
    Opt. Express 32, 8447 (2024)
  • K. Lin, X. Sun, F. Dirnberger, Y. Li, J. Qu, P. Wen, Z. Sofer, A. Söll, S. Winnerl, M. Helm, S. Zhou, Y. Dan, S. Prucnal
    Strong Exciton–Phonon Coupling as a Fingerprint of Magnetic Ordering in van der Waals Layered CrSBr
    ACS Nano 18, 2898 (2024)
  • P. Makushko, S. Kovalev, Y. Zabila, I. Ilyakov, A. Ponomaryov, A. Arshad, G. Lal Prajapati, T.V.A.G. de Oliveira, J-C. Deinert, P. Chekhonin, I. Veremchuk, T. Kosub, Y. Skourski, F. Ganss, D. Makarov, C. Ortix
    A tunable room-temperature nonlinear Hall effect in elemental bismuth thin films
    Nature Electronics 7, 207 (2024)
2023
  • S. Polatkan, E. Uykur, J. Wyzula, M. Orlita, C. Shekhar, C. Felser, M. Dressel, and A. V. Pronin
    Magneto-optical response of the Weyl semimetal NbAs: Experimental results and hyperbolic-band computations
    Phys. Rev. B 108, L241201 (2023)
  • S. Polatkan, E. Uykur, I. Mohelsky, J. Wyzula, M. Orlita, C. Shekhar, C. Felser, M. Dressel, A. V. Pronin
    Exchange gap in GdPtBi probed by magneto-optics
    Phys. Rev. B 108, L201201 (2023)
  • J. W. Han, P. Sai, D. B. But, E. Uykur, S. Winnerl, G. Kumar, M. L. Chin, R. L. Myers-Ward, M. T. Dejarld, K. M. Daniels, T. E. Murphy, W. Knap, M. Mittendorff
    Strong transient magnetic fields induced by THz-driven plasmons in graphene disks
    Nat. Commun. 14, 7493 (2023)
  • S. Sobolev, A. P. Lanz, T. Dong, A. Pokharel, V. Kabanov, T.-Q. Xu, Y. Wang, Z.-Z. Gan, L.-Y. Shi, N.-L. Wang, A. Pashkin, E. Uykur, S. Winnerl, M. Helm, J. Demsar
    Possible Eliashberg-Type Superconductivity Enhancement Effects in a Two-Band Superconductor MgB2 Driven by Narrow-Band THz Pulses
    Phys. Rev. Lett. 131, 186903 (2023)
  • G. Jarc, S. Y. Mathengattil, A. Montanaro, F. Giusti, E. M. Rigoni, R. Sergo, F. Fassioli, S. Winnerl, S. Dal Zilio, D. Mihailovic, P. Prelovšek, M. Eckstein, D. Fausti
    Cavity-mediated thermal control of metal-to-insulator transition in 1T-TaS2
    Nature 622, 487 (2023)
  • T. A. Uaman Svetikova, T. V. A. G. de Oliveira, A. Pashkin, A. Ponomaryov, C. Berger, L. Fürst, F. B. Bayer, E. G. Novik, H. Buhmann, L. W. Molenkamp, M. Helm, T. Kiessling, S. Winnerl, S. Kovalev, G. V. Astakhov
    Giant THz Nonlinearity in Topological and Trivial HgTe-Based Heterostructures
    ACS Photonics 10, 3708 (2023)
  • M. Wenzel, A. A. Tsirlin, F. Capitani, Y. T. Chan, B. R. Ortiz, S. D. Wilson, M. Dressel, E. Uykur
    Pressure evolution of electron dynamics in the superconducting kagome metal CsV3Sb5
    npj Quantum Mater. 8, 45 (2023)
  • I. Fotev, S. Winnerl, S. Aswartham, S. Wurmehl, B. Büchner, H. Schneider, M. Helm, A. Pashkin
    Ultrafast relaxation dynamics of spin density wave order in BaFe2As2 under high pressures
    Phys. Rev. B 108, 035101 (2023)
  • A. A. Tsirlin, B. R. Ortiz, M. Dressel, S. D. Wilson, S. Winnerl, E. Uykur
    Effect of nonhydrostatic pressure on the superconducting kagome metal CsV3Sb5
    Phys. Rev. B 107, 174107 (2023)
  • K. Ishioka, A. Pashkin, C. Bernhard, H. Petek, X. Yao, J. Demsar
    Selective coupling of coherent optical phonons in YBa2Cu3O7−δ with electronic transitions
    Phys. Rev. B 107, 184302 (2023)
  • L. Kuhrts, L. Helmbrecht, W. L. Noorduin, D. Pohl, X. Sun, A. Palatnik, C. Wetzker, A. Jantschke, M. Schlierf, I. Zlotnikov
    Recruiting Unicellular Algae for the Mass Production of Nanostructured Perovskites
    Adv. Sci. 10, 2300355 (2023)
  • M. Helm, S. Winnerl, A. Pashkin, J. M. Klopf, J.-C. Deinert, S. Kovalev, P. Evtushenko, U. Lehnert, R. Xiang, A. Arnold, A. Wagner, S. M. Schmidt, U. Schramm, T. Cowan, P. Michel
    The ELBE infrared and THz facility at Helmholtz-Zentrum Dresden-Rossendorf
    Eur. Phys. J. Plus 138, 158 (2023)
2022
  • M. Wenzel, A. A. Tsirlin, O. Iakutkina, Q. Yin, H. C. Lei, M. Dressel, E. Uykur
    Effect of magnetism and phonons on localized carriers in the ferrimagnetic kagome metals GdMn6Sn6 and TbMn6Sn6
    Phys. Rev. B 106, L241108 (2022)
  • P. Makushko, T. Kosub, O. V. Pylypovskyi, N. Hedrich, J. Li, A. Pashkin, S. Avdoshenko, R. Hübner, F. Ganss, D. Wolf, A. Lubk, M. O. Liedke, M. Butterling, A. Wagner, K. Wagner, B. J. Shields, P. Lehmann, I. Veremchuk, J. Fassbender, P. Maletinsky, D. Makarov
    Flexomagnetism and vertically graded Néel temperature of antiferromagnetic Cr2O3 thin films
    Nat. Commun. 13, 6745 (2022)
  • I. Ilyakov, A. Ponomaryov, J. M. Klopf, A. Pashkin, J.-C. Deinert, T. V. A. G. de Oliveira, P. Evtushenko, M. Helm, S. Winnerl, and S. Kovalev
    Field-resolved THz-pump laser-probe measurements with CEP-unstable THz light sources
    Opt. Express 30, 42141 (2022)
  • F. Meng, F. Han, U. Kentsch, A. Pashkin, C. Fowley, L. Rebohle, M. D. Thomson, S. Suzuki, M. Asada, and H. G. Roskos
    Coherent coupling of metamaterial resonators with dipole transitions of boron acceptors in Si
    Opt. Lett. 47, 4969 (2022)
  • F. Meng, F. Walla, Q. ul-Islam, A. Pashkin, H. Schneider, C. Jungemann, M. D. Thomson, and H. G. Roskos
    Importance of valence-band anharmonicity and carrier distribution for third- and fifth-harmonic generation in Si:B pumped with intense terahertz pulses
    Phys. Rev. B 106, 075203 (2022)
  • M. Wenzel, B. R. Ortiz, S. D. Wilson, M. Dressel, A. A. Tsirlin, and E. Uykur
    Optical study of RbV3Sb5: Multiple density-wave gaps and phonon anomalies
    Phys. Rev. B 105, 245123 (2022)
  • D. Nuzhnyy, V. Bovtun, E. Buixaderas, J. Petzelt, M. Savinov, M. Kempa, M. Paściak, I. Rafalovskyi, V. Chelod Paingad, P. Kužel, S. Kamba, D. Repček, A. Pashkin, V. A. Trepakov, and Z. Trybuła
    Unusual dynamics of the ferroelectric phase transition in K1−xLixTaO3 crystals
    Phys. Rev. B 105, 184103 (2022)
  • G. Jarc, S. Y. Mathengattil, F. Giusti, M. Barnaba, A. Singh, A. Montanaro, F. Glerean, E. M. Rigoni, S. Dal Zilio, S. Winnerl, D. Fausti
    Tunable cryogenic terahertz cavity for strong light–matter coupling in complex materials
    Rev. Sci. Instrum. 93, 033102 (2022)
  • M. Pinterić, S. Roh, S. Hammer, J. Pflaum, M. Dressel, E. Uykur
    Distinction of charge transfer and Frenkel excitons in pentacene traced via infrared spectroscopy
    J. Mater. Chem. C 10, 10, 5582 (2022)
  • T. Venanzi, M. Selig, A. Pashkin, S. Winnerl, M. Katzer, H. Arora, A. Erbe, A. Patanè, Z. R. Kudrynskyi, Z. D. Kovalyuk, L. Baldassarre, A. Knorr, M. Helm, and H. Schneider
    Terahertz control of photoluminescence emission in few-layer InSe
    Appl. Phys. Lett. 120, 092104 (2022)
  • A. Seidl, R. Anvari, M. M. Dignam, P. Richter, T. Seyller, H. Schneider, M. Helm, and S. Winnerl
    Pump-induced terahertz anisotropy in bilayer graphene
    Phys. Rev. B 105, 085404 (2022)
  • M. Wang, Y. Yu, S. Prucnal, Y. Berencén, M. S. Shaikh, L. Rebohle, M. B. Khan, V. Zviagin, R. Hübner, A. Pashkin, A. Erbe, Y. M. Georgiev, M. Grundmann, M. Helm, R. Kirchner, S. Zhou
    Mid- and far-infrared localized surface plasmon resonances in chalcogen-hyperdoped silicon
    Nanoscale 14, 2826 (2022)
2021
  • L. Balaghi, S. Shan, I. Fotev, F. Moebus, R. Rana, T. Venanzi, R. Hübner, T. Mikolajick, H. Schneider, M. Helm, A. Pashkin, E. Dimakis
    High electron mobility in strained GaAs nanowires
    Nat. Comm. 12, 6642 (2021)
  • C. Wagner, M. Schwuchow, T. Venanzi, H. Schneider, S. Winnerl, A. Thränhardt
    Kinetic Monte-Carlo Simulation of Exciton Hopping: Urbach Tails in Gas-Molecule Decorated MoSe2
    Phys. Status Solidi B 258, 2100186 (2021)
  • I. G. Vasileiadis, L. Lymperakis, A. Adikimenakis, A. Gkotinakos, V. Devulapalli, C. H. Liebscher, M. Androulidaki, R. Hübner, Th. Karakostas, A. Georgakilas, Ph. Komninou, E. Dimakis, G. P. Dimitrakopulos
    Substitutional synthesis of sub-nanometer InGaN/GaN quantum wells with high indium content
    Sci. Rep. 11, 20606 (2021)
  • S. Chae, W. J. Choi, I. Fotev, E. Bittrich, P. Uhlmann, M. Schubert, D. Makarov, J. Wagner, A. Pashkin, A. Fery
    Stretchable Thin Film Mechanical-Strain-Gated Switches and Logic Gate Functions Based on a Soft Tunneling Barrier
    Adv. Mater. 33, 2104769 (2021)
  • T. Venanzi, M. Selig, S. Winnerl, A. Pashkin, A. Knorr, M. Helm, and H. Schneider
    Terahertz-Induced Energy Transfer from Hot Carriers to Trions in a MoSe2 Monolayer
    ACS Photonics 8, 2931 (2021)
  • J. Li, R. Rana, L. G. Zhu, C. L. Liu, H. Schneider, and A. Pashkin
    Optical Kerr nonlinearity and multiphoton absorption of DSTMS measured by the Z-scan method
    J. Opt. Soc. Am. B 38, 2511 (2021)
  • J. Li, R. Rana, L. G. Zhu, C. L. Liu, H. Schneider, and A. Pashkin
    Limitation of THz conversion efficiency in DSTMS pumped by intense femtosecond pulses
    Opt. Express 29, 22494 (2021)
  • M. L. Chin, S. Matschy, F. Stawitzki, J Poojali, H. A. Hafez, D. Turchinovich, S. Winnerl, G. Kumar, R. L. Myers-Ward, M. T. Dejarld, K. M. Daniels, H. D. Drew, T. E. Murphy, and M. Mittendorff
    Observation of strong magneto plasmonic nonlinearity in bilayer graphene discs
    J. Phys. Photonics 3, 01LT01 (2021)
  • K. Liu, J. Li, H. Qi, M. Hambsch, J. Rawle, A. R. Vázquez, A. S. Nia, A. Pashkin, H. Schneider, Th. Heine, M. Helm, S. C. B. Mannsfeld, U. Kaiser, R. Dong, X. Feng
    A two-dimensional polyimide-graphene heterostructure with ultra-fast interlayer charge transfer
    Angewandte Chemie 60, 13859 (2021)
  • T. Nörenberg, L. Wehmeier, D. Lang, S. C. Kehr, and L. M. Eng
    Compensating for artifacts in scanning near-field optical microscopy due to electrostatics
    APL Photonics 6, 036102 (2021)
  • R. Rana, J. M. Klopf, C. Ciano, A. Singh, S. Winnerl, H. Schneider, M. Helm, A. Pashkin
    Gold implanted germanium photoswitch for cavity dumping of a free-electron laser
    Applied Physics Letters 118, 011107 (2021)
  • A. Singh, J. Li, A. Pashkin, R. Rana, S. Winnerl, M. Helm, H. Schneider
    High-field THz pulses from GaAs photoconductive emitter for non-linear THz studies
    Optics Express 29, 19920 (2021)
  • M. Wang, E. García-Hemme, Y. Berencén, R. Hübner, Y. Xie, L. Rebohle, Ch. Xu, H. Schneider, M. Helm, and S. Zhou
    Silicon-based intermediate-band infrared photodetector realized by Te hyperdoping
    Advanced Optical Materials 2021, 2001546 (2021)
  • M. Welsch, A. Singh, S. Winnerl, A. Pashkin, M. Xu, M. Li, M. Helm, and H. Schneider
    High-bias-field operation of GaAs photoconductive terahertz emitters
    Journal of Infrared, Millimeter and Terahertz Waves 42, 537-546 (2021)
  • M. Xu, H. Dong, C. Liu, Y. Wang, L. Hu, C. Lan, W. Luo, H. Schneider
    Investigation of an Opposed-Contact GaAs Photoconductive Semiconductor Switch at 1-kHz Excitation
    IEEE Trans. Electron Devices 68, 2355 (2021)
2020
  • H. Arora, R. Dong, T. Venanzi, J. Zscharschuch, H. Schneider, M. Helm, X. Feng, E. Cánovas, A. Erbe
    Demonstration of a Broadband Photodetector Based on a Two‐Dimensional Metal–Organic Framework
    Advanced Materials 32, 1907063 (2020)
  • C. Ciano, L. Persichetti, M. Montanari, L. Di Gaspare, G. Capellini, L. Baldassarre, M. Ortolani, A. Pashkin, M. Helm, S. Winnerl, M. Virgilio, and M. De Seta
    Electron-phonon coupling in n-type Ge two-dimensional systems
    Physical Review B 102, 205302 (2020)
  • C. Ciano, M. Virgilio, L. Bagolini, L. Baldassarre, A. Rossetti, A. Pashkin, M. Helm, M. Montanari, L. Persichetti, L. Di Gaspare, G. Capellini, D.J. Paul, G. Scalari, J. Faist, M. de Seta, and M. Ortolani
    Electron Population Dynamics in Optically Pumped Asymmetric Coupled Ge/SiGe Quantum Wells: Experiments and Models
    Photonics 7, 2 (2020)
  • C. Ciano, M. Virgilio, L. Bagolini, L. Baldassarre, A. Pashkin, M. Helm, M. Montanari, L. Persichetti, L. Di Gaspare, G. Capellini, D.J. Paul, G. Scalari, J. Faist, M. de Seta, and M. Ortolani
    Terahertz absorption-saturation and emission from electron-doped germanium quantum wells
    Optics Express 28, 7245 (2020)
  • J. Hillbrand, N. Opačak, M. Piccardo, H. Schneider, G. Strasser, F. Capasso, B. Schwarz
    Mode-locked short pulses from an 8 μm wavelength semiconductor laser
    Nature Communications 11, 5788 (2020)
  • L. Hu, M. Xu, X. Li, Y. Wang, Yi Wang, H. Dong, and H. Schneider
    Performance investigation of bulk photoconductive semiconductor switch based on reversely biased p+in+ structure
    IEEE Transactions on Electron Devices 67, 4963 (2020)
  • M. M. Jadidi, M. Kargarian, M. Mittendorff, Y. Aytac, B. Shen, J. C. König-Otto, S. Winnerl, N. Ni, A. L. Gaeta, T. E. Murphy, and H. D. Drew
    Nonlinear optical control of chiral charge pumping in a topological Weyl semimetal
    Physical Review B 102, 245123 (2020)
  • F. Meng, M. D. Thomson, Q. ul-Islam, B. Klug, A. Pashkin, H. Schneider, and H. G. Roskos
    Intracavity third-harmonic generation in Si:B pumped by intense terahertz pulses
    Physical Review B 102, 075205 (2020)
  • M. Mittendorff, S. Winnerl, and T. E. Murphy
    2D THz Optoelectronics
    Advanced Optical Materials, early view (2020)
  • R. Rana, L. Balaghi, I. Fotev, H. Schneider, M. Helm, E. Dimakis, and A. Pashkin
    Nonlinear terahertz field-induced charge transport and transferred-electron effect in InGaAs nanowires
    Nano Letters 20, 3225–3231 (2020)
  • J. Schmidt, S. Winnerl, E. Dimakis, R. Hübner, H. Schneider, and M. Helm
    All-THz pump-probe spectroscopy of the intersubband AC-Stark effect in a wide GaAs quantum well
    Optics Express 28, 25358-25370 (2020)
  • A. Singh, A. Pashkin, S. Winnerl, M. Welsch, C. Beckh, P. Sulzer, A. Leitenstorfer, M. Helm, and H. Schneider
    Up to 70 THz bandwidth from implanted Ge photoconductive antenna excited by a fibre laser
    Light: Science & Applications 9, 30 (2020)
  • A. Singh, M. Welsch, S. Winnerl, M. Helm, H. Schneider
    Non-plasmonic improvement in photoconductive THz emitters using nano- and micro-structured electrodes
    Optics Express 28, 35490 (2020)
  • A. Soltani, F. Kuschewski, M. Bonmann, A. Generalov, A. Vorobiev, F. Ludwig, M. M. Wiecha, D. Cibiraite, F. Walla, S. Winnerl, S. C. Kehr, L. M. Eng, J. Stake, and H. G. Roskos
    Direct nanoscopic observation of plasma waves in the channel of a graphene field-effect transistor
    Light: Science & Applications 9, 97 (2020)
  • T. Venanzi, H. Arora, S. Winnerl, A. Pashkin, A. Patané, Z. D. Kovalyuk, Z. R. Kudrynskyi, K. Watanabe, T. Taniguchi, A. Erbe, M. Helm, and H. Schneider
    Photoluminescence dynamics in few-layer InSe
    Phys. Rev. Materials 4, 044001 (2020)
2019
  • H. Arora, Y. Jung, T. Venanzi, K. Watanabe, T. Taniguchi, René Hübner, H. Schneider, M. Helm, J. C. Hone, and A. Erbe
    Effective hexagonal boron nitride passivation of few-layered InSe and GaSe to enhance their electronic and optical properties
    ACS Applied Materials & Interfaces 11, 43840 (2019)
  • L. Balaghi, G. Bussone, R. Grifone, R. Hübner, J. Grenzer, M. Ghorbani-Asl, A.V. Krasheninnikov, H. Schneider, M. Helm, and E. Dimakis
    Widely tunable GaAs band gap via strain engineering in core/shell nanowires
    Nature Communications 10, 2793 (2019)
  • D. B. But, M. Mittendorff, C. Consejo, F. Teppe, N. N. Mikhailov, S. A. Dvoretskii, C. Faugeras, S. Winnerl, M. Helm, W. Knap, M. Potemski, and M. Orlita
    Suppressed Auger scattering and tunable light emission of Landau-quantized massless Kane electrons
    Nature Photonics 13, (2019)
  • I. Fotev, L. Balaghi, J. Schmidt, H. Schneider, M. Helm, E. Dimakis, and A. Pashkin
    Electron dynamics in InxGa1-xAs shells around GaAs nanowires probed by terahertz spectroscopy
    Nanotechnology 30, 244004 (2019)
  • X.-P. Huang, K. Chen, M.-X. Qi, P.-F. Zhang, Y. Li, S. Winnerl, H. Schneider, Y. Yang, and S. Zhang
    Plasmonic Field Guided Patterning of Ordered Colloidal Nanostructures
    Nanophotonics 8, 505 (2019)
  • M. M. Jadidi, K. M. Daniels, R. L. Myers-Ward, D. K. Gaskill, J. C. König-Otto, S. Winnerl, A. B. Sushkov, H. D. Drew, T. E. Murphy, and M. Mittendorff
    Optical Control of Plasmonic Hot Carriers in Graphene
    ACS Photonics 6, 302 (2019)
  • D. Lang, L. Balaghi, S. Winnerl, H. Schneider, R. Hübner, S. C. Kehr, L. M. Eng, M. Helm, E. Dimakis, and A. Pashkin,
    Nonlinear plasmonic response of doped nanowires observed by infrared nanospectroscopy
    Nanotechnology 30, 084003 (2019)
  • C. Li, V. Gusev, E. Dimakis, T. Dekorsy, and M. Hettich
    Broadband Photo-Excited Coherent Acoustic Frequency Combs and Mini-Brillouin-Zone Modes in a MQW-SESAM Structure
    Appl. Sci. 9, 289 (2019)
  • R. Rana, J. M. Klopf, J. Grenzer, H. Schneider, M. Helm, and A. Pashkin
    Nonthermal nature of photoinduced insulator-to-metal transition in NbO2
    Phys. Rev. B 99 (Rapid Comm.), 041102(R) (2019)
  • A. Singh, M. Welsch, S. Winnerl, M. Helm, and H. Schneider
    Improved electrode design for interdigitated large-area photoconductive terahertz emitters
    Optics Express 27, 13108 (2019)
  • T. Venanzi, H. Arora, A. Erbe, A. Pashkin, S. Winnerl, M. Helm, and H. Schneider
    Exciton localization in MoSe2 monolayers induced by adsorbed gas molecules
    Appl. Phys. Lett. 114, 172106 (2019)
  • L. Wehmeier, D. Lang, Y. Liu, X. Zhang, S. Winnerl, L. M. Eng, and S. C. Kehr
    Polarization-dependent near-field phonon nanoscopy of oxides: SrTiO3, LiNbO3, and PbZr0.2Ti0.8O3
    Phys. Rev. B 100, 035444 (2019)
  • M. Xu, M.X. Li, X.F. Liu, K. Liu, G.H. Qu, V. Wang, L. Hu, and H. Schneider
    Transient Characteristics of Interdigitated GaAs Photoconductive Semiconductor Switch at 1-kHz Excitation
    IEEE Electron Dev. Lett. 40, 1136 (2019)
  • J. Zhu, Y. Xia, G. Li, S. Zhou, S. Wimmer, V. V. Volobuev, G. Springholz, A. Pashkin, M. Helm, and H. Schneider
    Band gap, Urbach tail and electron-phonon interactions in topological insulator Bi3Se2 and band insulator (Bi0.89In0.11)2Se3
    Appl. Phys. Lett. 114, 162105 (2019)
2018
  • J. M. Braun, H. Schneider, M. Helm, R. Mirek, L. A. Boatner, R. E. Marvel, R. F. Haglund Jr., and A. Pashkin
    Ultrafast response of photoexcited carriers in VO2 at high-pressure
    New J. Phys. 20, 083003 (2018)
  • S. Brem, F. Wendler, S. Winnerl, and E. Malic
    Electrically pumped graphene-based Landau-level laser
    Phys. Rev. Mat. 2, 034002 (2018)
  • O. A. Castañeda-Uribe, C. A. Criollo, S. Winnerl, M. Helm, and A. Avila
    Comparative study of equivalent circuit models for photoconductive antennas
    Optics Express 26, 29017 (2018)
  • G. P. Dimitrakopulos, I. G. Vasileiadis, C. Bazioti, J. Smalc-Koziorowska, S. Kret, E. Dimakis, N. Florini, Th. Kehagias, T. Suski, Th. Karakostas, T. D. Moustakas, and Ph. Komninou
    Compositional and strain analysis of In(Ga)N/GaN short period superlattices
    J. Appl. Phys. 123, 024304 (2018)
  • J. Döring, D. Lang, L. Wehmeier, F. Kuschewski, T. Nörenberg, S. C. Kehr, and L. M. Eng
    Low-temperature nanospectroscopy of the structural ferroelectric phases in single-crystalline barium titanate
    Nanoscale 10, 18074 (2018)
  • T. Firkala, F. Kuschewski, T. Nörenberg, J. M. Klopf, A. Pashkin, H. Foerstendorf, M. Rudolph, S. C. Kehr, and L. M. Eng
    Near-Field Optical Examination of Potassium n-Butyl Xanthate/Chalcopyrite Flotation Products
    Minerals 8, 118 (2018)
  • A. Gupta, G. Rana, A. Bhattacharya, A. Singh, R. Jain, R. D. Bapat, S. P. Duttagupta, and S. S. Prabhu
    Enhanced optical-to-THz conversion efficiency of photoconductive antenna using dielectric nano-layer encapsulation
     APL Photonics 3, 051706 (2018)
  • D. Lang, J. Döring, T. Nörenberg, A. Butykai, I. Kezsmarki, H. Schneider, S. Winnerl, M. Helm, S. C. Kehr, and L. M. Eng
    Infrared nanoscopy down to liquid helium temperatures
     Rev. Sci. Instrum. 89, 033702 (2018)
  • A. Lisauskas, K. Ikamas, S. Massabeau, M. Bauer, D. Cibiraité, J. Matukas, J. Mangeney, M. Mittendorff, S. Winnerl, V. Krozer, and H. G. Roskos
    Field-effect transistors as electrically controllable nonlinear rectifiers for the characterization of terahertz pulses
    APL Photonics 3, 051705 (2018)
  • C. Müller-Landau, S. Malzer, H. B. Weber, G. H. Döhler, S. Winnerl, P. Burke, A. C. Gossard and S. Preu
    Terahertz generation with ballistic photodiodes under pulsed operation
    Semiconductor Science Technol. 33, 114015 (2018)
  • D. de Moura Pedroso, J. Schmidt, A. Passaro, M. Helm, and H. Schneider
    Fano signatures between intersubband and ponderomotive responses in MQW structures
    Optics Express 26, 24054 (2018)
  • H. Plank, J. Pernul, S. Gebert, S. N. Danilov, J. König-Otto, S. Winnerl, M. Lanius, J. Kampmeier, G. Mussler, I. Aguilera, D. Grützmacher, and S. D. Ganichev
    Infrared/Terahertz Spectra of the Photogalvanic Effect in (Bi,Sb)Te based Three Dimensional Topological Insulators
    Phys. Rev. Mat. 2, 024202 (2018)
  • S. Regensburger, A. K. Mukherjee, S. Schönhuber, M. A. Kainz, S. Winnerl, J. M. Klopf, H. Lu, A. C. Gossard, K. Unterrainer, and S. Preu
    Broadband Terahertz Detection With Zero-Bias Field-Effect Transistors Between 100 GHz and 11.8 THz With a Noise Equivalent Power of 250 pW/√Hz at 0.6 THz
    IEEE Trans. on Terahertz Science and Technology 8, 465 (2018)
  • A. Singh, A. Pashkin, S. Winnerl, M. Helm, and H. Schneider,
    Gapless broadband terahertz emission from a germanium photoconductive emitter
    ACS Photonics 5, 2718 (2018)
  • T. Tauchnitz, Y. Berdnikov, V. Dubrovskii, H. Schneider, M. Helm, and E. Dimakis,
    A simple route to synchronized nucleation of self-catalyzed GaAs nanowires on silicon for sub-Poissonian length distributions
    Nanotechnology 28, 504004 (2018)
  • M. Wang, Y. Berencén, S. Prucnal, E. García-Hemme, R. Hübner, Y. Yuan, Chi Xu, L. Rebohle, R. Böttger, R. Heller, H. Schneider, W. Skorupa, M. Helm, and S. Zhou,
    Extended infrared photoresponse in Te-hyperdoped Si at room temperature
    Phys. Rev. Applied 10, 024254 (2018)
  • Z.-H. Zhai, H.-F. Zhu, Q. Shi, S.-C. Chen, J. Li, Z.-R. Li, H. Schneider, and L.-G. Zhu
    Enhanced photoresponses of an optically driven VO2-based THz wave modulator near percolation threshold
    Appl. Phys. Lett. 113, 231104 (2018)
  • Z.-H. Zhai, S.-C. Chen, L.-H. Du, S.-C. Zhong, W. Huang, Z.-R. Li, H. Schneider, Q. Shi, and L.-G. Zhu
    Giant impact of self-photothermal on light-induced ultrafast insulator-to-metal transition in VO2 nanofilms at terahertz frequency
    Optics Express 26, 28051 (2018)
2017
  • Y. Berencén, S. Prucnal, F. Liu, I. Skorupa, R. Hübner, L. Rebohle, S. Zhou, H. Schneider, M. Helm, and W. Skorupa
    Room-temperature short-wavelength infrared Si photodetector
    Scientific Reports 7, 43688 (2017)
  • J. Bühler, C. Schmidt, J. Fischer, A. Leitenstorfer, H. Schneider, A. Pashkin, and D. V. Seletskiy
    Quantum interference controlled current in InSb injected by intense terahertz radiation
    Journal of Infrared, Millimeter and Terahertz Waves 38, 808 (2017)
  • N. Deßmann, S. G. Pavlov, V. V. Tsyplenkov, E. E. Orlova, A. Pohl, V. N. Shastin, R. Kh. Zhukavin, S. Winnerl, M. Mittendorff, N. V. Abrosimov, H. Schneider, and H.-W. Hübers
    Dynamics of non-equilibrium charge carriers in p-germanium doped by gallium
    Phys. Stat. Sol. B (2017)
  • V. Jovic, S. Moser, S. Ulstrup, D. Goodacre, E. Dimakis, R. Koch, G. Katsoukis, L. Moreschini, S.-K. Mo, C. Jozwiak, A. Bostwick, E. Rotenberg, Th. D. Moustakas, and K. E. Smith
    How Indium Nitride Senses Water
    Nano Lett. 17, 7339 (2017)
  • J. C. König-Otto, Y. Wang, A. Belyanin, C. Berger, W. A. de Heer, M. Orlita, A. Pashkin, H. Schneider, M. Helm, and S. Winnerl
    Four-Wave Mixing in Landau-Quantized Graphene
    Nano Lett. 17, 2184 (2017)
  • C. Li, N. Krauß, G. Schäfer, L. Ebner, O. Kliebisch, J. Schmidt, S. Winnerl, M. Hettich, and T. Dekorsy
    High-speed asynchronous optical sampling based on GHz Yb:KYW oscillators
    Optics Express 25, 9204 (2017)
  • E. Malic, T. Winzer, F. Wendler, S. Brem, R. Jago, A. Knorr, M. Mittendorff, J. C. König-Otto, T. Plötzing, D. Neumaier, H. Schneider, M. Helm, and S. Winnerl,
    Carrier dynamics in graphene: ultrafast many-particle phenomena
    Annalen der Physik (Berlin) 529, 1700038 (2017)
  • B. Piętka, N. Bobrovska, D. Stephan, M. Teich, M. Król, S. Winnerl, A. Pashkin, R. Mirek, K. Lekenta, F. Morier-Genoud, H. Schneider, B. Deveaud, M. Helm, M. Matuszewski, and J. Szczytko
    Doubly dressed bosons: Exciton polaritons in a strong terahertz field
    Phys. Rev. Lett. 119, 077403 (2017)
  • S. Ruffenach, A. Kadykov, V. V. Rumyantsev, J. Torres, D. Coquillat, D. But, S. S. Krishtopenko, C. Consejo, W. Knap, S. Winnerl, M. Helm, M. A. Fadeev, N. N. Mikhailov, S. A. Dvoretskii, V. I. Gavrilenko, S. V. Morozov, and F. Teppe
    HgCdTe-based heterostructures for terahertz photonics
    APL Materials 5, 035503 (2017)
  • T. Seifert, S. Jaiswal, M. Sajadi, G. Jakob, S. Winnerl, M. Wolf, M. Kläui, and T. Kampfrath
    Ultrabroadband single-cycle terahertz pulses with peak fields of 300 kV cm−1 from a metallic spintronic emitter
    Appl. Phys. Lett. 110, 252402 (2017)
  • T. Tauchnitz, T. Nurmamytov, R. Hübner, M. Engler, S. Facsko, H. Schneider, M. Helm, and E. Dimakis,
    Decoupling the two roles of Ga droplets in the self-catalyzed growth of GaAs nanowires on SiOx/Si(111)
    ACS Crystal Growth and Design 17, 5276−5282 (2017)
  • F. Wendler, M. Mittendorff, J. König-Otto, S. Brem, C. Berger, W. A. de Heer, R. Böttger, H. Schneider, M. Helm, S. Winnerl, and E. Malic
    Symmetry-breaking supercollisions in Landau-quantized graphene
    Phys. Rev. Lett. 119, 067405 (2017)
  • S. Winnerl, M. Mittendorff, J. C. König-Otto, H. Schneider, M. Helm, T. Winzer, A. Knorr, and E. Malic
    Ultrafast processes in graphene: from fundamental manybody interactions to device applications
    Annalen der Physik (Berlin) 529, 1700022 (2017)
  • T. Winzer, M. Mittendorff, S. Winnerl, H. Mittenzwey, R. Jago, M. Helm, E. Malic, and A. Knorr
    Unconventional double-bended saturation of carrier occupation in optically excited graphene due to many-particle interactions
    Nature Comms. 8, 15042 (2017)
  • R. Kh. Zhukavin, K. A. Kovalevskii, S. M. Sergeev, Yu. Yu. Choporova, V. V. Gerasimov, V. V. Tsyplenkov, B. A. Knyazev, N. V. Abrosimov, S. G. Pavlov, V. N. Shastin, H. Schneider, N. Deßmann, O. A. Shevchenko, N. A. Vinokurov, G. N. Kulipanov, and H.-W. Hübers
    Low-temperature intracenter relaxation times of shallow donors in germanium
    JETP Letters 106, 571 (2017)
2016
  • L. Balaghi, T. Tauchnitz, R. Hübner, L. Bischoff, H. Schneider, M. Helm, and E. Dimakis
    Droplet-confined alternate pulsed epitaxy of GaAs nanowires on Si substrates down to CMOS-compatible temperatures
    Nano Lett. 16, 4032 (2016)
  • P. Corfdir, R. B. Lewis, O. Marquardt, H. Küpers, J. Grandal, E. Dimakis, A. Trampert, L. Geelhaar, O. Brandt, and R. T. Phillips
    Exciton recombination at crystal-phase quantum rings in GaAs/InxGa1-xAs core/multishell nanowires
    Appl. Phys. Lett. 109, 082107 (2016)
  • F. Eßer, S. Winnerl, A. Patanè, M. Helm, and H. Schneider
    Excitonic mobility edge and ultra-short photoluminescence decay time in n-type GaAsN
    Appl. Phys. Lett. 109, 182113 (2016)
  • B. Green, S. Kovalev, V. Asgekar, G. Geloni, U. Lehnert, T. Golz, M. Kuntzsch, C. Bauer, J. Hauser, J. Voigtlaender, B. Wustmann, I. Koesterke, M. Schwarz, M. Freitag, A. Arnold, J. Teichert, M. Justus, W. Seidel, C. Ilgner, N. Awari, D. Nicoletti, S. Kaiser, Y. Laplace, S. Rajasekaran, L. Zhang, S. Winnerl, H. Schneider, G. Schay, I. Lorincz, A. A. Rauscher, I. Radu, S. Mährlein, T. H. Kim, J. S. Lee, T. Kampfrath, S. Wall, J. Heberle, A. Malnasi-Csizmadia, A. Steiger, A. S. Müller, M. Helm, U. Schramm, T. Cowan, P. Michel, A. Cavalleri, A. S. Fisher, N. Stojanovic, and M. Gensch
    High-field high-repetition-rate sources for the coherent THz control of matter
    Scientific Reports 6, 22256 (2016)
  • M. M. Jadidi, J. C. König-Otto, S. Winnerl , A. B. Sushkov, H. D. Drew, T. E. Murphy, M. Mittendorff
    Nonlinear Terahertz Absorption of Graphene Plasmons
    Nano Lett. 16 (4), 2734 (2016)
  • K. J. Kaltenecker, J. C. Otto, M. Mittendorff, S. Winnerl, H. Schneider, M. Helm, H.P. Helm, M. Walther, and B. M. Fischer
    Gouy phase shift of a radially polarized Gaussian beam
    Optica 3, 35 (2016)
  • S. C. Kehr, R. G. P. McQuaid, L. Ortmann, T. Kämpfe, F. Kuschewski, D. Lang, J. Döring, J. M. Gregg, and L. M. Eng
    A local superlens
    ACS Photonics 3, 20(2016)
  • F. Kuschewski, H.-G. von Ribbeck, J. Döring, S. Winnerl, L. M. Eng and S. C. Kehr
    Narrow-band near-field nanoscopy in the spectral range from 1.3 to 8.5 THz
    Appl. Phys. Lett.108, 113102 (2016)
  • J. C. König-Otto, M. Mittendorff, T. Winzer, F. Kadi, E. Malic, A. Knorr, C. Berger, W. A. de Heer, A. Pashkin, H. Schneider, M. Helm, and S. Winnerl
    Slow noncollinear Coulomb scattering in the vicinity of the Dirac point in graphene
    Phys. Rev. Lett. 117, 087401 (2016)
  • S. G. Pavlov, N. Deßmann, A. Pohl, V. B. Shuman, L. М. Portsel, А. N. Lodygin, Yu. A. Astrov, S. Winnerl, H. Schneider, N. Stavrias, A. F. G. van der Meer, V. V. Tsyplenkov, K. A. Kovalesky, R. Kh. Zhukavin, V. N. Shastin, P. M. Haas, N. V. Abrosimov, and H.-W. Hübers
    Dynamics of nonequilibrium electrons on neutral center states of interstitial magnesium donors in silicon
    Phys. Rev. B 94, 075208 (2016)
  • S. Prucnal, F. Liu, M. Voelskow, L. Vines, L. Rebohle, D. Lang, Y. Berencén, S. Andric, R. Boettger, M. Helm, S. Zhou, and W. Skorupa
    Ultra-doped n-type germanium thin films for sensing in the mid-infrared
    Scientific Reports 6, 27643 (2017)
  • D. Sabbagh, J. Schmidt, S. Winnerl, M. Helm, L. Di Gaspare, M. De Seta, M. Virgilio, and M. Ortolani
    Electron dynamics in silicon-germanium terahertz quantum fountain structures
    ACS Photonics 3, 403 (2016)
  • C. Schmidt, J. Bühler, B. Mayer, A. Pashkin, A. Leitenstorfer, and D. V. Seletskiy
    Controlled polar asymmetry of few-cycle and intense mid-infrared pulses
    Journal of Optics 18, 05LT01 (2016)
  • A. Singh, S. Winnerl, J. C. König-Otto, D. R. Stephan, M. Helm, H. Schneider
    Plasmonic efficiency enhancement at the anode of strip line photoconductive terahertz emitters
    Opt. Express 24, 22628 – 22634 (2016)
  • D. Stephan, J. Bhattacharyya, Y.H. Huo, O.G. Schmidt, A. Rastelli, M. Helm, and H. Schneider
    Inter-sublevel dynamics in single InAs/GaAs quantum dots induced by strong terahertz excitation
    Appl. Phys. Lett. 108, 082107 (2016)
  • R. J. Suess, S. Winnerl, H. Schneider, M. Helm, C. Berger, W. A. de Heer, T. E. Murphy, and M. Mittendorff,
    Role of transient reflection in graphene nonlinear infrared optics
    ACS Photonics 3, 1069 (2016)
  • J. Zhu, F. Liu, S. Zhou, C. Franke, S. Wimmer, V. V. Volobuev, G. Springholz, A. Pashkin, H. Schneider, and M. Helm
    Lattice vibrations and electrical transport in (Bi1-xInx)2Se3 films
    Appl. Phys. Lett. 109, 202103 (2016)
2015
  • G. Bussone, H. Schäfer-Eberwein, E. Dimakis, A. Biermanns, D. Carbone, A. Tahraoui, L. Geelhaar, P. Haring Bolívar, T. U. Schülli, and U. Pietsch
    Correlation of Electrical and Structural Properties of Single As-Grown GaAs Nanowires on Si (111) Substrates
    Nano Lett. 15, 981 (2015)
  • N. Deßmann, S. G. Pavlov, A. Pohl, N. V. Abrosimov, S. Winnerl, M. Mittendorff, R. Kh. Zhukavin, V. V. Tsyplenkov, D. V. Shengurov, V. N. Shastin, and H.-W. Hübers
    Lifetime-limited, subnanosecond terahertz germanium photoconductive detectors
    Appl. Phys. Lett. 106, 171109 (2015)
  • F. Eßer, O. Drachenko, A. Patanè, M. Ozerov, S. Winnerl, H. Schneider, and M. Helm
    Direct determination of the electron effective mass of GaAsN by terahertz cyclotron resonance spectroscopy
    Appl. Phys. Lett. 107, 062103 (2015)
  • M. Fehrenbacher, S. Winnerl, H. Schneider, J. Döring, S. C. Kehr, L. M. Eng, Y. Huo, O. G. Schmidt, K. Yao, Y. Liu, and M. Helm
    Plasmonic Superlensing in Doped GaAs
    Nano Lett. 15, 1057 (2015)
  • C. Franke, M. Walther, M. Helm, H. Schneider
    Two-photon quantum well infrared photodetectors below 6 THz
     Infrared Physics Technol. 70, 30 (2015)
  • A. Hassdenteufel, J. Schmidt, C. Schubert, B. Hebler, M. Helm, M. Albrecht, and R. Bratschitsch
    Low-remanence criterion for helicity-dependent all-optical magnetic switching in ferrimagnets
    Phys. Rev. B 91, 104431 (2015)
  • J. Y. Jia, T. M. Wang, Y. H. Zhang, W. Z. Shen, and H. Schneider
    High-Temperature Photon-Noise-Limited Performance Terahertz Quantum-Well Photodetectors
     IEEE Trans. Terahertz Science Technol. 5, 715 (2015)
  • N. Krauß, M. Haas, L. Niemeyer, S. Winnerl, M. Helm, and T. Dekorsy
    Terahertz emission based on large-area photoconductive emitters illuminated via beam interference
     Electronics Lett. 51, 1357 (2015)
  • M. Köhl, P. Schroth, A. A. Minkevich, J.-W. Hornung, E. Dimakis, C. Somaschini, L. Geelhaar, T. Aschenbrenner, S. Lazarev, D. Grigoriev, U. Pietsch and T. Baumbach
    Polytypism in GaAs nanowires: determination of the interplanar spacing of wurtzite GaAs by X-ray diffraction
    J. Synchrotron Rad. 22, 67 (2015)
  • B. Mayer, C. Schmidt, A. Grupp, J. Bühler, J. Oelmann, R. E. Marvel, R. F. Haglund Jr., T. Oka, D. Brida, A. Leitenstorfer, and A. Pashkin
    Tunneling breakdown of a strongly correlated insulating state in VO2 induced by intense multiterahertz excitation
    Phys. Rev. B 91, 235113 (2015)
  • M. Mittendorff, J. Kamann, J. Eroms, D. Weiss, C. Drexler, S. D. Ganichev, J. Kerbusch, A. Erbe, R. J. Suess, T. E. Murphy, S. Chatterjee, K. Kolata, J. Ohser, J. C. König-Otto, H. Schneider, M. Helm, and S. Winnerl
    Universal ultrafast detector for short optical pulses based on graphene
    Optics Express 23, 28728 (2015)
  • M. Mittendorff, F. Wendler, E. Malic, A. Knorr, M. Orlita, M. Potemski, C. Berger, W. A. de Heer, H. Schneider, M. Helm, and S. Winnerl
    Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering
     Nature Physics 11, 75 (2015)
  • S. Preu, M. Mittendorff, S. Winnerl, O. Cojocari, A. Penirschke
    THz Autocorrelators for ps Pulse Characterization Based on Schottky Diodes and Rectifying Field-Effect Transistors
     IEEE Trans. Terahertz Science Technol. 5, 922 (2015)
  • S. Regensburger, M. Mittendorff, S. Winnerl, H. Lu, A. C. Gossard, S. Preu
    Broadband THz detection from 0.1 to 22 THz with large area field-effect transistors
    Optics Express 23, 20732 (2015)
  • J. Schmidt, S. Winnerl, W. Seidel, C. Bauer, M. Gensch, H. Schneider, and M. Helm
    Single-pulse picking at kHz repetition rates using a Ge plasma switch at the free-electron laser FELBE
     Rev. Sci. Instrum. 86, 063103 (2015)
  • Ph. Schroth, M. Köhl, J.-W. Hornung, E. Dimakis, C. Somaschini, L. Geelhaar, A. Biermanns, S. Bauer, S. Lazarev, U. Pietsch, and T. Baumbach
    Evolution of Polytypism in GaAs Nanowires during Growth Revealed by Time-Resolved in situ x-ray Diffraction
     Phys. Rev. Lett. 114, 055504 (2015)
  • C. Sorger, S. Preu, J. Schmidt, S. Winnerl, Y. V. Bludov, N. M. R. Peres, M. I. Vasilevskiy, and H. B. Weber
    Terahertz response of patterned epitaxial graphene
    New J. Phys. 17, 053045 (2015)
2014
  • J. Bhattacharyya, S. Zybell, F. Eßer, M. Helm, H. Schneider, L. Schneebeli, C. N. Böttge, B. Breddermann, M. Kira, S. W. Koch, A. M. Andrews, and G. Strasser
    Magnetic control of Coulomb scattering and terahertz transitions among excitons
    Phys. Rev. B 89, 125313 (2014)
  • A. Biermanns, E. Dimakis, A. Davydok, T. Sasaki, L. Geelhaar, M. Takahasi⊥, and U. Pietsch
    Role of Liquid Indium in the Structural Purity of Wurtzite InAs Nanowires That Grow on Si(111)
    Nano Lett. 14, 6878 (2014)
  • G. Bussone, E. Dimakis, R. Grifone, A. Biermanns, A. Tahraoui, D. Carbone, L. Geelhaar, T. U. Schülli, and U. Pietsch
    Impact of strain induced by polymer curing in benzocyclobutene embedded semiconductor nanostructures
    Phys. Stat. Sol. (RRL) 8, 1007 (2014)
  • D. B. But, C. Drexler, M. V. Sakhno, N. Dyakonova, O. Drachenko, F. F. Sizov, A. Gutin, S. D. Ganichev and W. Knap
    Nonlinear photoresponse of field effect transistors terahertz detectors at high irradiation intensities
    J. Appl. Phys. 115, 164514 (2014)
  • N. Deßmann, S. G. Pavlov, V. N. Shastin, R. Kh. Zhukavin, V. V. Tsyplenkov, S. Winnerl, M. Mittendorff, N. V. Abrosimov, H. Riemann, and H.-W. Hübers
    Time-resolved electronic capture in n-type germanium doped with antimony
    Phys. Rev. B 89, 035205 (2014)
  • J. Döring, H.-G. von Ribbeck, M. Fehrenbacher, S. C. Kehr, and L. M. Eng
    Near-field resonance shifts of ferroelectric barium titanate domains upon lowtemperature phase transition
    Appl. Phys. Lett. 105, 053109 (2014)
  • M. R. Hao, S. Zhang, Y. H. Zhang, W. Z. Shen, H. Schneider, and H. C. Liu
    Re-examining the Doping Effect on the Performance of Quantum Well Infrared Photodetectors
    IEEE J. Quantum Electrons Letters 50, 3 (2014)
  • M. R. Hao, S. Zhang, Y. H. Zhang, W. Z. Shen, H. Schneider, and H. C. Liu
    Near Room Temperature Photon Noise Limited Quantum Well Infrared Photodetector
    Laser Photonics Rev. 8, 297 (2014)
  • J. Y. Jia, J. H. Gao, M. R. Hao, T. M. Wang, W. Z. Shen, Y. H. Zhang, J. C. Cao, X. G. Guo, and H. Schneider
    Dark current mechanism of terahertz quantum-well photodetectors
    J. Appl. Phys. 116, 154501 (2014)
  • A. Hassdenteufel, C. Schubert, J. Schmidt, P. Richter, D. R. T. Zahn, G. Salvan, M. Helm, R. Bratschitsch and M. Albrecht
    Dependence of all-optical magnetic switching on the sublattice magnetization orientation in Tb-Fe thin films
    Appl. Phys. Lett. 105, 112403 (2014)
  • F. Kadi, T. Winzer, E. Malic, A. Knorr, F. Göttfert, M. Mittendorff, S. Winnerl, and M. Helm
    Microscopic Description of intraband absorption in graphene: The occurrence of transient negative differential transmission
    Phys. Rev. Lett. 113, 035502 (2014)
  • M. Mittendorff, T. Winzer, E. Malic, A. Knorr, C. Berger, W. A. de Heer, H. Schneider, M. Helm, and S. Winnerl
    Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene
    Nano Lett. 8, 1504 (2014)
  • M. Mittendorff, M. Orlita, M. Potemski, C. Berger, W. A. de Heer, H. Schneider, M. Helm, and S. Winnerl
    Intraband carrier dynamics in Landau-quantized multilayer epitaxial graphene
    New J. Phys. 16, 123021 (2014)
  • W. Pan, E. Dimakis, G. T. Wang, T. D. Moustakas, and D. C. Tsui
    Two-dimensional electron gas in monolayer InN quantum wells
    Appl. Phys. Lett. 105, 213503 (2014)
  • S. G. Pavlov, N. Deßmann, V. N. Shastin, R. Kh. Zhukavin, B. Redlich, A. F. G. van der Meer, M. Mittendorff, S. Winnerl, N. V. Abrosimov, H. Riemann, and H.-W. Hübers
    Terahertz Stimulated Emission from Silicon Doped by Hydrogenlike Acceptors
    Phys. Rev. X 4, 021009 (2014)
  • C. Schubert, A. Hassdenteufel, P. Matthes, J. Schmidt, M. Helm, R. Bratschitsch and M. Albrecht
    All-optical helicity dependent magnetic switching in an artificial zero moment magnet
    Appl. Phys. Lett. 104, 082406 (2014)
  • M. Teich, M. Wagner, D. Stehr, H. Schneider, M. Helm, C. N. Böttge, A. C. Klettke, S. Chatterjee, M. Kira, S. W. Koch, G. Khitrova, and H. M. Gibbs
    Systematic investigation of THz-induced excitonic Rabi splitting
    Phys. Rev. B 89, 115311 (2014)
  • M. Virgilio, M. Ortolani, M. Teich, S. Winnerl, M. Helm, D. Sabbagh, G. Capellini, and M. De Seta
    Combined effect of electron and lattice temperatures on the long intersubband relaxation times of Ge/SixGe1−x quantum wells
    Phys. Rev. B 89, 045311 (2014)
  • S. Zybell, J. Bhattacharyya, S. Winnerl, F. Eßer, M. Helm, H. Schneider, L. Schneebeli, C. N. Böttge, M. Kira, S. W. Koch, A. M. Andrews, and G. Strasser
    Characterizing intra-exciton Coulomb scattering in terahertz excitations
    Appl. Phys. Lett. 105, 201109 (2014)
2013
  • M. Beck, I. Rousseau, M. Klammer, P. Leiderer, M. Mittendorff, S. Winnerl, M. Helm, G. N. Gol’tsman, and J. Demsar
    Transient Increase of the Energy Gap of Superconducting NbN Thin Films Excited by Resonant Narrow-Band Terahertz Pulses
    Phys. Rev. Lett. 110, 267003 (2013)
  • C. N. Böttge, B. Breddermann, L. Schneebeli, M. Kira, S. W. Koch, J. Bhattacharyya, H. Schneider, and M. Helm
    Transient Increase of the Terahertz-induced effects on excitons in magnetic field
    Phys. Stat. Sol. C, doi: 10.1002/pssc.201200702 (2013)
  • A. Dienst, E. Casandruc, D. Fausti, L. Zhang, M. Eckstein, M. Hoffmann, V. Khanna, N. Dean, M. Gensch, S. Winnerl, W. Seidel, S. Pyon, T. Takayama, H. Takagi, and A. Cavalleri
    Optical excitation of Josephson plasma solitons in a cuprate superconductor
    Nature Materials 12, 535–541 (2013)
  • J. DiMaria, E. Dimakis, Th. D. Moustakas, and R. Paiella
    Plasmonic off-axis unidirectional beaming of quantum-well luminescence
    Appl. Phys. Lett. 103, 251108 (2013)
  • O. Drachenko, D. Kozlov, A. V. Ikonnikov, K. E. Spirin, V. Gavrilenko, H. Schneider, M. Helm, and J.Wosnitza
    Long spin relaxation time of holes in InGaAs/GaAs quantum wells probed by cyclotron resonance spectroscopy
    Phys. Rev. B 87, 075315 (2013)
  • A. Hassdenteufel, B. Hebler, C. Schubert, A. Liebig, M. Teich, M. Helm, M. Aeschlimann, M. Albrecht, and R. Bratschitsch
    Thermally Assisted All-Optical Helicity Dependent Magnetic Switching in Amorphous Fe100–xTbx Alloy Films
    Adv. Mat. 25, 3122-3128 (2013)
  • M. Mittendorff, M. Xu, R. J. B. Dietz, H. Künzel, B. Sartorius, H. Schneider, M. Helm, and S. Winnerl
    Large area photoconductive THz emitter for 1.55 µm excitation based on an InGaAs heterostructure
    Nanotechnology 24, 214007 (2013)
  • M. Mittendorff, S. Winnerl, J. Kamann, J. Eroms, D. Weiss, H. Schneider, and M. Helm
    Ultrafast graphene-based broadband THz detector
    Appl. Phys. Lett. 103, 021113 (2013)
  • S. Preu, M. Mittendorff, S. Winnerl, H. Lu, A. C. Gossard, and H. B. Weber
    Ultra-fast transistor-based detectors for precise timing of near infrared and THz signals
    Optics Express 21, 17941(2013)
  • W. D. Rice, J. Kono, S. Zybell, S. Winnerl, J. Bhattacharyya, H. Schneider, M. Helm, B. Ewers, A. Chernikov, M. Koch, S. Chatterjee, G. Khitrova, H. M. Gibbs, L. Schneebeli, B. Breddermann, M. Kira, and S. W. Koch
    Observation of forbidden exciton transitions mediated by Coulomb interactions in photoexcited semiconductor quantum wells
    Phys. Rev. Lett. 110, 137404 (2013)
  • M. Teich, S. Winnerl, D.R. Stephan, H. Schneider, M. Helm, and L.R. Wilson
    Intersublevel dephasing in InAs/GaAs quantum dots below the Reststrahlen band
    Appl. Phys. Lett. 103, 252110 (2013)
  • M. Teich, M. Wagner, H. Schneider, and M. Helm
    Semiconductor quantum well excitons in strong, narrowband terahertz fields
    New J. Phys. 15, 065007 (2013)
  • S. Winnerl, F. Göttfert, M. Mittendorff, H. Schneider, M. Helm, T. Winzer, E. Malic, A. Knorr, M. Orlita, M. Potemski, M. Sprinkle, C. Berger, and W. A. de Heer
    Time-resolved spectroscopy on epitaxial graphene in the infrared spectral range: relaxation dynamics and saturation behavior
    J. Phys.: Condens. Matter 25, 054202 (2013)
  • M. Xu, M. Mittendorff, R. J. B. Dietz, H. Künzel, B. Sartorius, T. Göbel, H. Schneider, M. Helm, and S. Winnerl
    THz generation and detection with InGaAs-based large-area photoconductive devices excited at 1.55 µm
    Appl. Phys. Lett. 103, 251114 (2013)
2012
  • M. Baudisch, M. Wagner, H. Schneider, D. Stehr, M. Helm, P. Atkinson, Y. Huo, A. Rastelli, O. G. Schmidt, A. M. Andrews, and G. Strasser
    Fano effect due to ponderomotive coupling in intersubband response of semiconductor quantum wells
    Phys. Rev. B 86, 075305 (2012)
  • J. Bhattacharyya, S. Zybell, S. Winnerl, M. Helm, M. Hopkinson, L. R. Wilson, and H. Schneider
    In-plane interdot carrier transfer in InAs/GaAs quantum dots
    Appl. Phys. Lett. 100, 051109 (2012)
  • S. Boppel, A. Lisauskas, M. Mundt, D. Seliuta, L. Minkevicius, I. Kasalynas, G. Valusis, M. Mittendorff, S. Winnerl, V. Krozer, and H. G. Roskos
    CMOS integrated antenna-coupled field-effect transistors for the detection of radiation from 0.2 to 4.3 THz
     IEEE Trans. Microwave Theory and Techniques 60, 3834 (2012)
  • A. Delga, M. Carras, V. Trinité, V. Guériaux, L. Doyennette, A. Nedelcu, H. Schneider, and V. Berger
    Master equation approach of classical noise in intersubband detectors
    Phys. Rev. B 85, 245414 (2012)
  • O. Drachenko and M. Helm
    Cyclotron resonance spectroscopy
    Springer Series in Materials Science Vol. 150, pp. 283-307 (2012)
  • R. Jacob, S. Winnerl, M. Fehrenbacher, J. Bhattacharyya, H. Schneider, M. T. Wenzel, H.-G. von Ribbeck, L. M. Eng, P. Atkinson, A. Rastelli, O. G. Schmidt, and M. Helm
    Intersublevel spectroscopy on single InAs-quantum dots by terahertz near-field microscopy
    Nano Letters 12, 4336-4340 (2012)
  • C. Kaya, C. Schneider, A. Al-Shemmary, W. Seidel, M. Kuntzsch, J. Bhattacharyya, M. Mittendorff, P. Evtushenko, S. Winnerl, G. Staats, M. Helm, N. Stojanovic, P. Michel, and M. Gensch
    Phase sensitive monitoring of electron bunch form and arrival time in superconducting linear accelerators
    Appl. Phys. Lett. 100, 141103 (2012)
  • C.M. Morris, D. Stehr, H.C. Kim, T.A. Truong, C. Pryor, P.M. Petroff, and M.S. Sherwin
    Terahertz Ionization of Highly-Charged Quantum Posts in a Perforated Electron Gas
    Nano Letters 12, 1115-1120 (2012)
  • M. Wagner, M. Teich, M. Helm, and D. Stehr
    Temperature dependence of the intraexcitonic AC Stark effect in semiconductor quantum wells
    Appl. Phys. Lett. 100, 152101 (2012)
  • S. Winnerl, R. Hubrich, M. Mittendorff, H. Schneider, and M. Helm
    Universal phase relation between longitudinal and transverse fields observed in focused terahertz beams
    New J. Phys. 14, 103049 (2012)
  • S. Winnerl
    Scalable Microstructured Photoconductive Terahertz Emitters
    Journal of Infrared, Millimeter, and Terahertz Waves 33, 431 - 454 (2012)
  • T. Winzer, A. Knorr, M. Mittendorff, S. Winnerl, D. Sun, T. B. Norris, M. Helm, and E. Malic
    Absorption saturation in optically pumped graphene
    Appl. Phys. Lett. 101, 221115 (2012)
2011
  • C.Balocco, S. R. Kasjoo, X. F. Lu, L. Q. Zhang, Y. Alimi, S. Winnerl, and A. M. Song
    Room-temperature operation of a unipolar nanodiode at terahertz frequencies
    Appl. Phys. Lett. 98, 223501 (2011)
  • J. Bhattacharyya, M. Wagner, S. Zybell, S. Winnerl, D. Stehr, M. Helm, and H. Schneider
    Simultaneous time and wavelength resolved spectroscopy under two-color near infrared and terahertz excitation
    Rev. Sci. Instrum. 82, 103107 (2011)
  • O. Drachenko, A. Patanè, N.V. Kozlova, Q.D. Zhuang, A. Krier, L. Eaves, and M. Helm
    Cyclotron resonance mass and Fermi energy pinning in the In(AsN) alloy
    Appl. Phys. Lett. 98, 103107 (2011)
  • O. Drachenko, H. Schneider, M. Helm, D. Kozlov, V. Gavrilenko, J. Wosnitza, and J. Leotin
    Modification to the central-cell correction of germanium acceptors
    Phys. Rev. B 84, 245207 (2011)
  • O. Drachenko, S. Winnerl, H. Schneider, M. Helm, J. Wosnitza, and J. Leotin
    Compact magnetospectrometer for pulsed magnets based on infrared quantum cascade lasers
    Rev. Sci. Instrum. 82, 033108 (2011);doi:10.1063/1.3556441
  • M. Giehler, M. Wienold, L. Schrottke, R. Hey, H. T. Grahn, S. G. Pavlov, H.-W. Hübers, S. Winnerl, and H. Schneider
    Mid-infrared pump-related electric-field domains in GaAs/(Al,Ga)As quantum-cascade structures for terahertz lasing without population inversion
    J. Appl. Phys. 110, 103104 (2011)
  • A. V. Ikonnikov, M. S. Zholudev, K. E. Spirin, A. A. Lastovkin, K. V. Maremyanin, V. Ya. Aleshkin, V. I. Gavrilenko, O. Drachenko, M. Helm, J. Wosnitza, M. Goiran, N. N. Mikhailov, S. A. Dvoretskii, F. Teppe, N. Diakonova, C. Consejo, B. Chenaud, and W. Knap
    Cyclotron resonance and interband optical transitions in HgTe/CdTe(0 1 3) quantum well heterostructures
    Semicond. Sci. Technol. 26, 125011 (2011)
  • S. C. Kehr, Y. M. Liu, L. W. Martin, P. Yu, M. Gajak, S.-Y. Yang, C.-H. Yang, M. T. Wenzel, R. Jacob, H.-G. von Ribbeck, M. Helm, X. Zhang, L. M. Eng, and R. Ramesh
    Near-field examination of perovskite-based superlenses and superlense-enhanced probe-object coupling
    Nature Communications 2, 249 (2011)
  • S.C. Kehr, Pu Yu, Y.M. Liu, M. Parzefall, A.I. Khan, R. Jacob, M.T. Wenzel, H.-G. Ribbeck, M. Helm, X. Zhang, L.M. Eng and R. Ramesh
    Microspectroscopy on perovskite-based superlenses
    Optical Materials Express 1, 1051 (2011)
  • T. A. Komissarova, V. N. Jmerik, S. V. Ivanov, O. Drachenko, X. Wang, and A. Yoshikawa
    Identification of the main contributions to the conductivity of epitaxial InN
    Phys. Rev. B 84, 035205 (2011)
  • J. Krause, M. Wagner, S. Winnerl, M. Helm, and D. Stehr
    Tunable narrowband THz pulse generation in scalable large area photoconductive antennas
    Opt. Express 19, 19114-19121 (2011)
  • M. Ortolani, D. Stehr, M. Wagner, M. Helm, G. Pizzi, M. Virgilio, G. Grosso, G. Capellini, and M. De Seta
    Long intersubband relaxation times in n-type germanium quantum wells
    Appl. Phys. Lett. 99, 201101 (2011)
  • M. Wagner, M. Helm, M. S. Sherwin, and D. Stehr
    Coherent control of a THz intersubband polarization in a voltage controlled single quantum well
    Appl. Phys. Lett. 99, 131109 (2011)
  • M. Wagner, H. Schneider, D. Stehr, S. Winnerl, A. M. Andrews, S. Schartner, G. Strasser and M. Helm
    Terahertz nonlinear optics using intra-excitonic quantum-well transitions: Sideband generation and AC Stark splitting
    Phys. Stat. Sol. (b) 248, 859 (2011)
  • S. Winnerl, M. Orlita, P. Plochocka, P. Kossacki, M. Potemski, T. Winzer, E. Malic, A. Knorr, M. Sprinkle, C. Berger, W.A. de Heer, H. Schneider, and M. Helm
    Carrier dynamics in epitaxial graphene close to the Dirac point
    Phys. Rev. Lett. 107, 237401 (2011)
  • S. Winnerl, D. Stehr, M. Wagner, H. Schneider, M. Helm, W. Seidel, P. Michel, E. A. Zibik, B. A. Carpenter, N. E. Porter, M. S. Skolnick, L. R. Wilson, T. Grange, R. Ferreira, G. Bastard, M. Orlita, P. Plochocka, P. Kossacki, M. Potemski, M. Sprinkle, C. Berger, and W. A. de Heer
    Time resolved spectroscopy on quantum dots and graphene at the FELBE free-electron laser
    Proc. SPIE 7937, 793708 (2011);doi:10.1117/12.873702
  • B. Zaks, D. Stehr, T.-A. Truong, P. M. Petroff, S. Hughes, and M. S. Sherwin
    THz-driven quantum wells: Coulomb interactions and Stark shifts in the ultrastrong coupling regime
    New J. Phys. 13, 083009 (2011)
  • S. Zybell, H. Schneider, S. Winnerl, M. Wagner, K. Köhler, M. Helm
    Photoluminescence dynamics in GaAs/AlGaAs quantum wells under pulsed intersubband excitation
    Appl. Phys. Lett. 99, 041103 (2011)
2010
  • M. Beck, H. Schäfer, G. Klatt, J. Demsar, S. Winnerl, M. Helm, and T. Dekorsy
    Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna
    Opt. Express 18, 9251-9257 (2010)
  • J. Bhattacharyya, M. Wagner, M. Helm, M. Hopkinson, L. R. Wilson, and H. Schneider
    Terahertz activated luminescence of trapped carriers in InGaAs/GaAs quantum dots
    Appl. Phys. Lett. 97, 031101 (2010)
  • R. Jacob, S. Winnerl, H. Schneider, M. Helm, M. T. Wenzel, H.-G. v. Ribbeck, L. M. Eng, and S. Kehr
    Quantitative determination of the charge carrier concentration of sub-surface implanted silicon by IR-near-field spectroscopy
    Opt. Express 18, 26206-26213 (2010)
  • O.A. Mironov, M. Goiran, J. Galibert, D.V. Kozlov, A.V. Ikonnikov, K.E. Spirin, V.I. Gavrilenko, G. Isella, M. Kummer, H. von Känel, O. Drachenko, M. Helm, J. Wosnitza, R.J.H. Morris, and D.R. Leadley
    Cyclotron Resonance of Extremely Conductive 2D Holes in High Ge Content Strained Heterostructures
    J. Low Temp. Phys. 159, 216 (2010)
  • N. Miura, N.V. Kozlova, K. Dörr, J. Freudenberger, L. Schultz, O. Drachenko, K. Sawano, and Y. Shiraki
    Quantum Transport and Cyclotron Resonance Study of Ge/SiGe Quantum Wells in High Magnetic Fields
    J. Low Temp. Phys. 159, 222 (2010)
  • F. Peter, S. Winnerl, H. Schneider, and M. Helm
    Excitation wavelength dependence of phase matched terahertz emission from a GaAs slab
    Opt. Express 18, 19574–19580 (2010)
  • I. C. Sandall, N. E. Porter, L. R. Wilson, M. Wagner, H. Schneider, S. Winnerl, and M. Helm
    Terahertz optical sideband emission in self-assembled quantum dots
    Appl. Phys. Lett. 96, 201105 (2010)
  • M. Wagner, H. Schneider, D. Stehr, S. Winnerl, A. M. Andrews, S. Schartner, G. Strasser, and M. Helm
    Observation of the intraexciton Autler-Townes effect in GaAs/AlGaAs semiconductor quantum wells
    Phys. Rev. Lett. 105, 167401 (2010)
2009
  • O. Drachenko, D. V. Kozlov, V. Ya. Aleshkin, V. I. Gavrilenko, K. V. Maremyanin, A. V. Ikonnikov, B. N. Zvonkov, M. Goiran, J. Leotin, G. Fasching, S. Winnerl, H. Schneider, J. Wosnitza, and M. Helm
    High-field splitting of the cyclotron resonance absorption in strained p-InGaAs/GaAs quantum wells
    Phys. Rev. B 79, 073301 (2009)
  • D. Golde, M. Wagner, D. Stehr, H. Schneider, M. Helm, A. M. Andrews, T. Roch, G. Strasser, M. Kira, and S. W. Koch
    Fano signatures in the intersubband terahertz response of optically excited semiconductor quantum wells
    Phys. Rev. Lett. 102, 127403 (2009)
  • A. Patanè, W. H. M. Feu, O. Makarovsky, O. Drachenko, L. Eaves, A. Krier, Q. D. Zhuang, M. Helm, M. Goiran, and G. Hill
    Effect of low nitrogen concentrations on the electronic properties of InAs1−xNx
    Phys. Rev. B 80, 115207 (2009)
  • F. Peter, S. Winnerl, H. Schneider, M. Helm, and K. Köhler
    Large-area terahertz emitters based on GaInAsN
    Proc. SPIE 7366 73661R (2009)
  • H. Schneider, H.C. Liu, S. Winnerl, C.Y. Song, O. Drachenko, M. Walther, J. Faist, and M. Helm
    Quadratic detection with two-photon quantum well infrared photodetectors
    Infrared Physics Technol. 52, 419 (2009)
  • H. Schneider, H. C. Liu, S. Winnerl, C. Y. Song, M. Walther, and M. Helm
    Terahertz two-photon quantum well infrared photodetector
    Optics Express 17, 12279-12284 (2009)
  • D. Stehr, C. M. Morris, D. Talbayev, M. Wagner, H. C. Kim, A. J. Taylor, H. Schneider, P. M. Petroff, and M. S. Sherwin
    Ultrafast carrier capture in InGaAs quantum posts
    Appl. Phys. Lett. 95, 251105 (2009)
  • D. Stehr, M. Wagner, H. Schneider, M. Helm, A. M. Andrews, T. Roch, G. Strasser
    Two color pump-probe studies of intraminiband relaxation in doped GaAs/AlGaAs superlattices
    Proc. SPIE 7214, 72141N (2009)
  • M. Wagner, D. Golde, D. Stehr, H. Schneider, M. Helm, A. M. Andrews, T. Roch, G. Strasser, M. Kira, and S. W. Koch
    Fano profile in the intersubband terahertz response of photoexcited GaAs/AlGaAs quantum wells
    Journal of Physics: Conference Series 193, 012073 (2009)
  • M. Wagner, H. Schneider, S. Winnerl, M. Helm, T. Roch, A. M. Andrews, S. Schartner and G. Strasser
    Resonant enhancement of second order sideband generation for intra-excitonic transitions in GaAs/AlGaAs multiple quantum wells
    Appl. Phys. Lett. 94, 241105 (2009)
  • S. Winnerl, B. Zimmermann, F. Peter, H. Schneider, and M. Helm
    Terahertz emitters and detectors for radially and azimuthally polarized beams
    Proc. SPIE 7366, 73661N (2009)
  • C. Wang, L. Kuznetsova, V. Gkortsas, L. Diehl, F. X. Kärtner, M. A. Belkin, A. Belyanin, X. Li, D. Ham, H. Schneider, P. Grant, C. Y. Song, S. Haffouz, Z. R. Wasilewski, H. C. Liu, and F. Capasso,
    Mode-locked pulses from mid-infrared Quantum Cascade Lasers
    Opt. Express 17, 12929-12943 (2009)
  • S. Winnerl, B. Zimmermann, F. Peter, H. Schneider, and M. Helm
    Terahertz Bessel-Gauss beams of radial and azimuthal polarization from microstructured photoconductive antennas
    Optics Express 17, 1571-1576 (2009)
  • E. A. Zibik, T. Grange, B. A. Carpenter, N. E. Porter, R. Ferreira, G. Bastard, D. Stehr, S.Winnerl, M. Helm, H. Y. Liu, M. S. Skolnick, and L. R. Wilson
    Long lifetimes of quantum-dot intersublevel transitions in the terahertz range
    Nature Materials 8, 803 - 807 (2009)
2008
  • A. Dreyhaupt, F. Peter, S. Winnerl, S. Nitsche, M. Wagner, H.Schneider, M. Helm, and K. Köhler
    Powerful Emitters and Easy-to-Use Detectors for Terahertz-Time-Domain Spectroscopy
    Technisches Messen 75, 3 (2008)
  • A. Gordon, C. Y. Wang,, L. Diehl, F. X. Kärtner, A. Belyanin, D. Bour, S. Corzine, G. Höfler, H. C. Liu, H. Schneider, T. Maier, M. Troccoli, J. Faist, and F. Capasso
    Multimode regimes in quantum cascade lasers: From coherent instabilities to spatial hole burning
    Phys. Rev. A 77, 053804 (2008)
  • S. C. Kehr, M. Cebula, O. Mieth, T. Härtling, J. Seidel, S. Grafström, L. M. Eng, S. Winnerl, D. Stehr, and M. Helm
    Anisotropy Contrast in Phonon-Enhanced Apertureless Near-Field Microscopy Using a Free-Electron Laser
    Phys. Rev. Lett. 100, 256403 (2008)
  • F. Peter, S. Winnerl, H. Schneider, M. Helm, and K. Köhler
    Terahertz emission from a large-area GaInAsN emitter
    Appl. Phys. Lett. 93, 101102 (2008)
  • P. Rauter, T. Fromherz, S. Winnerl, M. Zier, A. Kolitsch, M. Helm, and G. Bauer
    Terahertz Si:B blocked-impurity-band detectors defined by nonepitaxial methods
    Appl. Phys. Lett. 93, 261104 (2008)
  • H.-G. von Ribbeck, M. Brehm, D. W. van der Weide, S. Winnerl, O. Drachenko, M. Helm, and F. Keilmann
    Spectroscopic THz near-field microscope
    Opt. Express 16, 3430 (2008)
  • H. Schneider, H. C. Liu, S. Winnerl, O. Drachenko, M. Helm, and J. Faist
    Room-temperature mid-infrared two-photon photodetector
    Appl. Phys. Lett. 93, 101114 (2008)
  • H. Schneider, H. C. Liu, T. Maier, and M. Walther
    Two-photon photocurrent autocorrelation using intersubband transitions at nearly-resonant excitation
    Optics Express 16, 1523 (2008)
  • D. Stehr, M. Wagner, H. Schneider, M. Helm, A. M. Andrews, T. Roch, and G. Strasser
    Two-color pump-probe studies of intraminiband relaxation in doped GaAs/AlGaAs superlattices
    Appl. Phys. Lett. 92, 051104 (2008)
  • C. V.-B. Tribuzy, S. Ohser, M. Priegnitz, S. Winnerl, H. Schneider, M. Helm, J. Neuhaus, T. Dekorsy, K. Biermann, and H. Künzel
    Inefficiency of intervalley transfer in narrow InGaAs/AlAsSb quantum wells
    Phys. Stat. Sol. C 5, 229 (2008)
  • M. T. Wenzel, T. Härtling, P. Olk, S. C. Kehr, S. Grafström, S. Winnerl, M. Helm, and L. M. Eng
    Gold nanoparticle tips for optical field confinement in infrared scattering near-field optical microscopy
    Optics Express 16, 12302-12312 (2008)
  • M. Wienold, M.P. Semtsiv, S. Dressler, W.T. Masselink, K. Potzger, S. Winnerl, and M. Helm
    Fe-implantation for rear-facet coatings of InP-based quantum cascade lasers
    Electron. Lett. 44, 293 (2008)
  • S. Winnerl, F. Peter, S. Nitsche, A. Dreyhaupt, B. Zimmermann, M. Wagner, H. Schneider, M. Helm, and K. Köhler
    Generation and detection of THz radiation with scalable antennas based on GaAs substrates with different carrier lifetimes
    IEEE J. Sel.Top. Quantum. Electron. 14, 449 (2008)
2007
  • A. Ben Simon, Y. Paltiel, G. Jung, V. Berger, and H. Schneider
    Measurements of non-Gaussian noise in quantum wells
    Phys. Rev. B 76, 235308 (2007)
  • T. Grange, E. A. Zibik, R. Ferreira, G. Bastard, B. A. Carpenter, P. J. Phillips, D. Stehr, S. Winnerl, M. Helm, M. J. Steer, M. Hopkinson, J. W. Cockburn, M. S. Skolnick, and L. R. Wilson
    Singlet and Triplet Polaron Relaxation in Doubly Charged Self-Assembled Quantum Dots
    New J. Phys. 9, 259 (2007)
  • C. V-B. Grimm, M. Priegnitz, S. Winnerl, H. Schneider, M. Helm, K. Biermann, and H. Künzel
    Intersubband relaxation dynamics in single and double quantum wells based on strained InGaAs/AlAs/AlAsSb
    Appl. Phys. Lett. 91, 191121 (2007)
  • F. Peter, S. Winnerl, S. Nitsche, A. Dreyhaupt, H. Schneider, and M. Helm
    Coherent terahertz detection with a large-area, non-resonant photoconductive THz antenna
    Appl. Phys. Lett. 91, 081109 (2007)
  • S. Schneider, J. Seidel, S. Grafström, L. M. Eng, S. Winnerl, D. Stehr, and M. Helm
    Impact of optical in-plane anisotropy on near-field phonon polariton spectroscopy
    Appl. Phys. Lett. 90, 143101 (2007)
  • H. Schneider, T. Maier, H. C. Liu, and M. Walther
    Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells
    Appl. Phys. Lett. 91, 191116 (2007)
  • H. Schneider, O. Drachenko, S. Winnerl, M. Helm, T. Maier, and M. Walther
    Autocorrelation measurements of free-electron laser radiation using a two-photon QWIP
    Infrared Physics & Technology 50, 95 (2007)
  • H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther
    Autocorrelation measurements of the FELBE free-electron laser and photocurrent saturation study in two-photon QWIPs
    Proc. SPIE Vol. 6471, 64710T (2007)
2006
  • A. Bartels, A. Thoma, C. Janke, T. Dekorsy, A. Dreyhaupt, S. Winnerl, and M. Helm
    High-resolution THz spectrometer with kHz scan rates
    Opt. Express 14, 430 (2006)
  • A. Dreyhaupt, S. Winnerl, M. Helm, and T. Dekorsy
    Optimum excitation conditions for the generation of high-electric-field THz radiation from an oscillator-driven photoconductive device
    Optics Lett. 31, 1546 (2006)
  • T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl
    Quantum well infrared photodetector with voltage-switchable quadratic and linear response
    Appl. Phys. Lett. 88, 051117 (2006)
  • H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther
    Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors
    Appl. Phys. Lett. 89, 133508 (2006)
  • H. Schneider, C. Schönbein, R. Rehm, M. Walther and P. Koidl
    Domain pinning in quantum well infrared photodetectors
    Appl. Phys. Lett. 88, 051114 (2006)
  • D. Stehr, M. Helm, C. Metzner, and M. C. Wanke
    Microscopic theory of impurity states in coupled quantum wells and superlattices
    Phys. Rev. B 74, 085311 (2006)
  • D. Stehr, S. Winnerl, M. Helm, T. Dekorsy, T. Roch, and G. Strasser
    Pump-probe spectroscopy of interminiband relaxation and electron cooling in doped superlattices
    Appl. Phys. Lett. 88, 151108 (2006)
  • C. V.-B. Tribuzy, S. Ohser, S. Winnerl, J. Grenzer, H. Schneider, M. Helm, J. Neuhaus, T. Dekorsy, K. Biermann, and H. Künzel
    Femtosecond pump-probe spectroscopy of intersubband relaxation dynamics in narrow InGaAs/AlAsSb quantum well structures
    Appl. Phys. Lett. 89, 171104 (2006)