Title :
Correlation between the subband electronic temperatures and the internal quantum efficiency of THz quantum cascade lasers
Author :
Vitiello, Miriam Serena ; Scamarcio, Gaetano ; Scalari, Giacomo ; Walther, Christoph ; Faist, Jerome ; Beere, Harvey ; Ritchie, David ; Spagnolo, Vincenzo
Author_Institution :
Dipt. Interateneo di Fis. "M.Merlin", Univ. di Bari, Bari
Abstract :
We have measured the electronic temperature of the upper laser level (TE u) during continuous-wave operation in THz quantum-cascade lasers and found an experimental correlation with the occurrence of stimulated emission and the internal quantum efficiency.
Keywords :
quantum cascade lasers; submillimetre wave lasers; THz quantum cascade lasers; internal quantum efficiency; subband electronic temperatures; Electrical resistance measurement; Optical devices; Optical sensors; Optical superlattices; Optical waveguides; Power lasers; Quantum cascade lasers; Semiconductor lasers; Stimulated emission; Temperature; (140.3070) Infrared and far infrared lasers; (140.5965) Semiconductor lasers, quantum cascade;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
