Title :
Hot-electron cooling in THz quantum cascade lasers
Author :
Scamarcio, Gaetano ; Vitiello, Miriam S. ; Faist, Jerome ; Scalari, Giacomo ; Walther, Christoph ; Beere, Harvey E. ; Ritchie, David A.
Author_Institution :
Dipt. Interateneo di Fis. M. Merlin, Univ. degli Studi di Bari, Bari, Italy
Abstract :
Experimental evidence of a physical phenomenon characteristic of semiconductor lasers, i.e. the cooling of the electrons above the threshold for stimulated emission, is reported. By using a terahertz quantum-cascade laser as a prototype structure we show that this effect is directly related with the internal quantum efficiency (etaint).
Keywords :
hot carriers; laser beams; quantum cascade lasers; stimulated emission; submillimetre wave lasers; THz quantum cascade lasers; hot-electron cooling; internal quantum efficiency; physical phenomenon characteristics; semiconductor lasers; stimulated emission threshold; Electron emission; Electronics cooling; Laser modes; Laser theory; Prototypes; Quantum cascade lasers; Quantum mechanics; Semiconductor lasers; Stimulated emission; Temperature;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5325630
