Title :
Single-mode operation of terahertz quantum cascade lasers with distributed feedback resonators
Author :
Mahler, Lukas ; Kohler, Ralph ; Tredicucci, Alessandro ; Beltram, Fabio ; Beere, Harvey E. ; Linfield, Edmund H. ; Ritchie, David A. ; Davies, A. Giles
Author_Institution :
NEST-INFM, Pisa
Abstract :
Single-mode operation at 4.4 THz is obtained from distributed-feedback quantum-cascade lasers with complex-coupling metallic gratings. The emission shows a stable side-mode suppression of more than 20 dB at all injection currents and operating temperatures
Keywords :
diffraction gratings; distributed feedback lasers; infrared sources; laser cavity resonators; laser modes; quantum cascade lasers; submillimetre wave lasers; 4.4 THz; complex-coupling gratings; distributed feedback resonators; metallic gratings; quantum cascade lasers; single-mode operation; stable side-mode suppression; terahertz lasers;
Conference_Titel :
Lasers and Electro-Optics, 2004. (CLEO). Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
1-55752-777-6
