FELBE Publications

Publications resulting from experiments at FELBE in chronological order

2016   2015   2014   2013   2012   2011   2010   2009   2008   2007   2006

 

2016

S. G. Pavlov, N. Deßmann, A. Pohl, V. B. Shuman, L. M. Portsel, A. N. Lodygin, Y. A. Astrov, S. Winnerl, H. Schneider, N. Stavrias, A. F. G. van der Meer, V. V. Tsyplenkov, K. A. Kovalesky, R. K. Zhukavin, V. N. Shastin, N. V. Abrosimov, H.-W. Hübers
Dynamics of nonequilibrium electrons on neutral center states of interstitial magnesium donors in silicon
Phys. Rev. B 94, 075208 (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)

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)

D. Sabbagh, J. Schmidt, S. Winnerl, M. Helm , L. Di Gaspare, M. De Seta, M. Virgilio, M. Ortolani
Electron dynamics in silicon-germanium terahertz quantum fountain structures
ACS Photonics 3, 403 (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)

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)

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)

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)

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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)

F. Kuschewski, S.C. Kehr, B. Green, Ch. Bauer, M. Gensch, L.M. Eng
Optical nanoscopy of transient states in condensed matter Scientific Reports 5 ,2582 (2015)

S. G. Pavlov, N. Deßmann, A. Pohl, N. V. Abrosimov, M. Mittendorff, S. Winnerl, R. Kh. Zhukavin, V. V. Tsyplenkov, D. V. Shengurov, V. N. Shastin and H.-W. Hübers
Towards a life-time-limited 8-octave-infrared photoconductive germanium detector Journal of Physics: Conference Series 647,012070 (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 Transactions on Terahertz Science and Technology 5, 922 (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, S. Winnerl
Universal ultrafast detector for short optical pulses based on graphene
Optics Express 23, 28728 (2015)

T. A. Miller, R. W. Chhajlany, L. Tagliacozzo,B. Green, S. Kovalev , D. Prabhakaran, M. Lewenstein, M. Gensch, S. Wall
Terahertz field control of in-plane orbital order in La0.5Sr1.5MnO4
Nature Communications6, 8175 (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)

J. Schmidt, S. Winnerl, W. Seidel, Ch. 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. Instr. 86, 063103 (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)

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)

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)

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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. 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)

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)

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)

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)

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)

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)

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)

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2013

M. Teich, D.R. Stephan, S. Winnerl, 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. 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);

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)

M. Beck, I. Rousseau, M. Klammer, P. Leiderer, M. Mittendorff, S. Winnerl, M. Helm , G. N. Goltsman, and J. Demsar
Transient increase of the energy gap in superconducting NbN thin films excited by resonant narrow-band terahertz pulses
Phys. Rev. Lett. 110, 267003 (2013)

S. Winnerl, F. Göttfert, M. Mittendorff, H. Schneider, M. Helm, T. Winzer, E. Malic, A. Knorr, A.; M. Orlita, M. Potemski, M. Sprinkle, C. Berger, W. A. de Heer
Time-resolved spectroscopy on epitaxial graphene in the infrared spectral range: relaxation dynamics and saturation behaviour
J. Phys.: Condens. Matter 25 (2013) 054202

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 & A. Cavalleri
Optical excitation of Josephson plasma solitons in a cuprate superconductor
Nature Materials 12, 535–541 (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);

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2012

S. V. Morozov, M. S. Joludev, A. V. Antonov, V. V. Rumyantsev, V. I. Gavrilenko, V. Ya. Aleshkin, A. A. Dubinov, N. N. Mikhailov, S. A. Dvoretskiy, O. Drachenko, S. Winnerl, H. Schneider, and M. Helm
Study of Lifetimes and Photoconductivity Relaxation in Heterostructures with HgxCd1 – xTe/CdyHg1 – yTe Quantum Wells
Semiconductors 46(2012), 1362-1366;

S. Boppel, A. Lisauskas, M. Mundt, D. Seliuta, L. Minkevičius, I. Kašalynas, G. Valušis, V. Krozer, M. Mittendorff, S. Winnerl, Roskos, G. Hartmut
CMOS integrated antenna-coupled field-effect-transistors for the detection of radiation from 0.2 to 4.3 THz
IEEE Transactions on Microwave Theory and Techniques 60(2012)12, 3834-3843;

N. Deßmann, S. G. Pavlov, V. N. Shastin, R. Kh. Zhukavin, S. Winnerl, M. Mittendorff, H.-W. Hübers Time-resolved electronic capture in germanium doped with hydrogen-like impurity centers Proceedings of the IEEE 37th International Conference on Infrared, Millimeter and Terahertz Waves, ID:2569425;

C. Bauer, M. Gensch and J. Heberle
Enroute to investigating protein dynamics under selective vibrational excitation at the THz FEL FELBE
J. Phys.: Conf. Ser. 359, 012011 (2012);

R. Jacob, S. Winnerl, M. Fehrenbacher, J. Bhattacharyya, H. Schneider, M.T. Wenzel, H.-G.von Ribbeck, L.M. Eng, P. Atkinson, O.G. Schmidt, and M. Helm
Intersublevel spectroscopy on single InAs-quantum dots by terahertz near-field microscopy
Nano Letters 12, 4336 (2012);

M. Wagner, M.Teich, M. Helm, D. Stehr
Temperature dependence of the intraexcitonic AC Stark effect in semiconductor quantum wells
Appl. Phys. Lett. 100,051109 (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, 152101 (2012); doi:10.1063/1.3701578

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2011

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. 109, 103104 (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)

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 relaxation in epitaxial graphene photoexcited near the Dirac point
Phys. Rev. Lett. 107, 237401 (2011)

J. Bhattacharyya, M. Wagner, S. Zybell, S. Winnerl, D. Stehr, M. Helm, and H. Schneider
Simultaneous time and wavelength resolved spectroscopy under two-colour near infrared and terahertz excitation
Rev. Sci. Instrum. 82, 103107 (2011); doi:10.1063/1.3653394

S. Zybell, H. Schneider, S. Winnerl, M. Wagner, K. Köhler, and M. Helm
Photoluminescence dynamics in GaAs/AlGaAs quantum wells under pulsed intersubband excitation
Appl. Phys. Lett. 99, 041103 (2011); doi:10.1063/1.3615298

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)

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)

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)

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
physica status solidi (b) 248, 859 (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

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

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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).

I. C. Sandall, N. E. Porter, L. R. Wilson, M. Wagner, H. Schneider, S. Winnerl, and M. Helm
Tuneable 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 Interexciton Autler-Townes Effect in GaAs/AlGaAs Semiconductor Quantum Wells
Phys. Rev. Lett. 105, 167401(2010)

M. Wagner, H. Schneider, D. Stehr, S. Winnerl, A. M. Andrews, S. Schartner, G. Strasser, and M. Helm
Intraexciton terahertz nonlinear optics in semiconductor quantum wells: sideband generation and AC Stark splitting
35th Int. Conf. on Infrared, Millimeter, and Terahertz Waves (IRMMW-THZ 2010), 05.-10.09.2010, Roma, Italy
IEEE conference proceedings, 978-1-4244-6657-3

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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)

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 & Technology 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
Opt. Express 17, 12279-12284 (2009)

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
Proc. SPIE 7214, 72141N (2009)

G. Steiner, V. Sablinskas, W. Seidel, and R. Salzer
PM-IRRAS mapping of ultrathin molecular films with high spatial resolution

Anal. Bioanal. Chem. 395, 1641 (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).

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).

S. A. Zvyagin, M. Ozerov, E. Čižmár, D. Kamenskyi, S. Zherlitsyn, T. Herrmannsdörfer, J. Wosnitza, R. Wünsch, and W. Seidel
Terahertz-range free-electron laser electron spin resonance spectroscopy: Techniques and applications in high magnetic fields
Rev. Sci. Instrum. 80, 073102 (2009)

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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)

J.S. Lee, M. Gensch, K. Hinrichs, W. Seidel, and U. Schade
Determination of the polarization characteristics of the ELBE free electron laser
Infrared Physics & Technology 51, 537-540 (2008)

V. Sablinskas, J. Ceponkus, G. Steiner, and R. Salzer
Infrared spectroscopic imaging with high spatial resolution and high sensitivity
Proc. SPIE 6869, 68690X (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)

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)

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)

J. Wosnitza, T. Herrmannsdorfer, Y. Skourski, S. Zherlitsyn, S. Zvyagin, O. Drachenko, H. Schneider and M. Helm
Science at the Dresden High Magnetic Field Laboratory
AIP Conference Proceedings 1003, 311(2008)

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2007

H. Foerstendorf, W. Seidel, K. Heim, and G. Bernhard
Identification of actinide molecule complexes: A new vibrational spectroscopic approach at the free electron laser facility FELBE
J. Nucl. Mater. 366, 248 (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)

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 6471, 64710T (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)

D. Stehr, S. Winnerl, M. Helm, A. M. Andrews, T. Roch, and G. Strasser
Relaxation dynamics of interminiband transitions and electron cooling in doped GaAs/AlGaAs superlattices
AIP Conference Proceedings 893, 485 (2007)

S. Winnerl, D. Stehr, O. Drachenko, H. Schneider, M. Helm, W. Seidel, P. Michel, S. Schneider, J. Seidel, S. Grafström, L.-M. Eng, T. Roch, G. Strasser, T. Maier and M. Walther
FELBE Free-Electron Laser: Status and Application for Time Resolved Spectroscopy Experiments
Joint 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics ,18.-22.09.2006, Shanghai, Peoples Republic of China
IEEE Conference Proceedings,1-4244-0400-2, 159 (2007)

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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)

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)

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