Title :
FELBE Free-Electron Laser: Status and Application for Time Resolved Spectroscopy Experiments
Author :
Winnerl, S. ; Stehr, D. ; Drachenko, O. ; Schneider, H. ; Helm, M. ; Seidel, W. ; Michel, Patrice ; Schneider, S. ; Seidel, J. ; Grafström, S. ; Eng, L.-M. ; Roch, T. ; Strasser, G. ; Maier, T. ; Walther, M.
Author_Institution :
Forschungszentrum Rossendorf, Dresden
Abstract :
This paper reviews the basic properties of the infrared free-electron laser FELBE at the Forschungszentrum Rossendorf. At present FELBE delivers pulses with typical durations of 0.9-5 ps in the wavelength range 4-22 mum, which soon will be extended to 150 mum. Furthermore we report on recent experiments using FELBE, namely the study of phonon resonances in ferroelectric domains using a newly designed scattering scanning near-field optical microscope (s-SNOM), as well as pump-probe spectroscopy on doped semiconductor superlattices. The pump-probe signal reflects, apart from a component due to the bleaching of the interminiband transition, the temperature of the miniband electrons on a picosecond timescale.
Keywords :
free electron lasers; phonons; semiconductor superlattices; time resolved spectroscopy; Forschungszentrum Rossendorf; doped semiconductor superlattice; ferroelectric domain; infrared free-electron laser; miniband electron; phonon resonance; pump-probe spectroscopy; scattering scanning near-field optical microscope; time resolved spectroscopy; Ferroelectric materials; Free electron lasers; Laser applications; Optical design; Optical microscopy; Optical pulses; Optical scattering; Phonons; Resonance; Spectroscopy;
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368367
