Title :
Injectorless quantum cascade lasers as low threshold THz sources
Author :
Demmerle, F. ; Kath, M. ; Viyajaraghavan, K. ; Bohm, G. ; Belkin, M. ; Amann, M.-C.
Author_Institution :
Walter Schottky Inst., Tech. Univ. Munchen, Garching, Germany
Abstract :
We present a novel device concept for a low threshold terahertz source. Our device is based on difference frequency generation in a dual-wavelength quantum cascade laser for terahertz emission and utilizes a Cerenkov phase matching scheme. The active region is an injectorless design to reach lower current threshold densities than injectorbased devices.
Keywords :
current density; microwave photonics; optical frequency conversion; optical phase matching; quantum cascade lasers; Cerenkov phase matching scheme; active region; current threshold density; difference frequency generation; dual-wavelength quantum cascade laser; injectorless design; injectorless quantum cascade lasers; low threshold THz sources; low threshold terahertz source; terahertz emission; Performance evaluation;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665473
