Title :
Coherent THz emission from optically pumped parabolic quantum wells
Author :
Bratschitsch, Rudolf ; Muller, T. ; Kersting, R. ; Strasser, G. ; Unterrainer, K.
Author_Institution :
Inst. for Solid State Electron., Tech. Univ. Wien, Austria
Abstract :
Summary form only given. Recently, Sekine et al. [see Appl. Phys. Lett., vol. 74, p. 1006, 1999] reported on the optically pumped emission of THz radiation from grating-coupled intrasubband plasmons in a doped single quantum well. We present experiments which show that modulation doped parabolic quantum wells (PQWs) emit coherent THz radiation corresponding to the intersubband plasmon when excited by near infrared femtosecond laser pulses.
Keywords :
high-speed optical techniques; infrared sources; laser beam effects; optical pumping; plasmons; semiconductor quantum wells; submillimetre wave generation; GaAs-AlGaAs; THz radiation; coherent THz emission; coherent THz radiation; doped single quantum well; grating-coupled intrasubband plasmons; infrared femtosecond laser pulse; intersubband plasmon; modulation doped parabolic quantum wells; optically pumped emission; optically pumped parabolic quantum wells; Epitaxial layers; Gratings; Laser excitation; Optical modulation; Optical pumping; Plasmons; Pump lasers; Quantum well lasers; Stimulated emission; Ultrafast optics;
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
DOI :
10.1109/IQEC.2000.907857
