Title :
Optical two-photon absorption in GaAs measured by optical pump-terahertz probe spectroscopy
Author :
F. Kadlec;H. Nemec;P. Kuzel
Author_Institution :
Inst. of Phys., Acad. of Sci. of the Czech Republic, Prague, Czech Republic
fDate :
6/26/1905 12:00:00 AM
Abstract :
A novel scheme of optical pump-THz probe experiments was used to study the nonlinear absorption in GaAs. The crystal was excited by ultrashort laser pulses with wavelength 810 nm and fluences up to 4.2 mJ/cm/sup 2/, for which the single-photon absorption (SPA) saturates and the two-photon absorption (TPA) dominates. The TPA coefficient /spl beta/ and its anisotropy were determined.
Keywords :
"Optical pumping","Absorption","Gallium arsenide","Probes","Spectroscopy","Nonlinear optics","Optical saturation","Wavelength measurement","Laser excitation","Pump lasers"
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422181
