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(1) 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(2)
- Terahertz emitters(3) and detectors(4)
- Ultrafast optoelectronic components
- Molecular beam epitaxy of III-V nanowires(5)
- Phase transitions in transition metal oxides under high pressure(6)
- Correlation effects kagome metals
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(7)
Time-resolved optical experiments are performed with table-top femtosecond lasers(8) (Ti:sapphire oscillators, amplifiers, OPG/OPA, THz emitters) and with the free-electron laser at ELBE(9). The latter offers unique possibilities for time-resolved spectroscopy in the mid- and far-infrared regimes(10), in particular for investigations on semiconductors and their nanostructures(11). 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(12).
Content from Sidebar
URL of this article
https://www.hzdr.de/db/Cms?pOid=10636