Contact

PD Dr. habil. Harald Schneider

Head
Spectroscopy
h.schneiderAthzdr.de
Phone: +49 351 260 2880

News

05.01.2021 | Our publication on Gold implanted germanium photoswitch for cavity dumping of a free-electron laser has appeared in Applied Physics Letters.

09.11.2020 | Our paper on Non-plasmonic improvement in photoconductive THz emitters using nano- and micro-structured electrodes has been published in Optics Express.

13.08.2020 | Publication of our work on All-THz pump-probe spectroscopy of the intersubband AC-Stark effect in a wide GaAs quantum well in the journal Optics Express.

31.03.2020 | Publication of our results on Nonlinear Charge Transport in InGaAs Nanowires at Terahertz Frequencies in the journal Nano Letters.

03.03.2020 | Publication of our work Up to 70 THz bandwidth from implanted Ge photoconductive antenna excited by a fibre laser in the journal Light: Science & Applications, see also our recent press release.

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.

Eye catcher

Department of Spectroscopy (FWIH)

Research Topics

  • Optical investigations of novel materials in the visible, infrared, and terahertz regimes
  • Low-dimensional semiconductor structures: quantum wells, heterostructures, superlattices, quantum dots, graphene and other twodimensional semiconductors (monolayer transition metal dichalcogenides), topological insulators
  • Dynamical processes on femtosecond and picosecond time scales
  • Semiconductor electrons and excitons in strong terahertz fields
  • Terahertz emitters and detectors
  • Ultrafast optoelectronic components
  • Molecular beam epitaxy of III-V nanowires
  • Phase transitions in transition metal oxides under high pressure

Characterization Methods

  • Terahertz time-domain spectroscopy
  • Nonlinear laser spectroscopy, pump-probe, four-wave mixing
  • FTIR spectroscopy
  • Raman spectroscopy
  • Photoluminescence, electroluminescence
  • Time-resolved photoluminescence
  • Infrared and terahertz near-field microscopy

Time-resolved optical experiments are performed with table-top femtosecond lasers (Ti:sapphire oscillators, amplifiers, OPG/OPA, THz emitters) and with the free-electron laser at ELBE. The latter offers unique possibilities for time-resolved spectroscopy in the mid- and far-infrared regimes, in particular for investigations on semiconductors and their nanostructures. Synchronization of table-top femtosecond lasers to the free-electron laser is also possible (e. g, for two-color experiments). The department is also involved in the application of these measurement techniques at the Dresden High Magnetic Field Laboratory.


Contact

PD Dr. habil. Harald Schneider

Head
Spectroscopy
h.schneiderAthzdr.de
Phone: +49 351 260 2880