Title :
Distributed Feedback THz Quantum-Cascade Lasers Using Thin Double-Metallic Gratings
Author :
Marshall, Owen ; Alton, Jesse ; Worrall, Christopher ; Beere, Harvey ; Ritchie, David A. ; Barbieri, Stefano
Author_Institution :
Univ. of Cambridge, Cambridge
fDate :
5/15/2008 12:00:00 AM
Abstract :
Distributed feedback quantum-cascade lasers based on loss-coupled two-metal gratings are presented. Devices lasing on single longitudinal modes between 2.62 and 2.69 THz are demonstrated, with sidemode suppression of 30 dB. In addition, controllable grating coupling strength is demonstrated.
Keywords :
distributed feedback lasers; quantum cascade lasers; submillimetre wave lasers; distributed feedback quantum cascade lasers; double metallic gratings; frequency 2.62 THz to 2.69 THz; loss coupled two metal gratings; Distributed feedback devices; Etching; Frequency; Gratings; Laser feedback; Laser modes; Optical films; Optical waveguides; Quantum cascade lasers; Semiconductor lasers; Distributed feedback (DFB) lasers; gallium arsenide; quantum-cascade lasers (QCLs); terahertz (THz);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.921820
