Title :
Monolithically integrated Bragg reflectors to improve on the emitted power from metal-metal THz quantum cascade lasers
Author :
Brewer, Anthony ; Freeman, Joshua R. ; Beere, Harvey E. ; Ritchie, David A.
Author_Institution :
Cavendish Lab., Univ. of Cambridge, Cambridge, UK
Abstract :
A metal-metal waveguide quantum cascade laser operating with a monolithically integrated Bragg reflector at ~ 2.9 THz is demonstrated. For a Bragg reflector spacing of λ0/4 emission is suppressed to below that of a conventional device architecture; while as the spacing approaches λ0/2 power increases. We observe an enhancement in emitted optical power by up to a factor of seven compared to a same sized device with no Bragg reflector.
Keywords :
Bragg gratings; microwave photonics; quantum cascade lasers; terahertz wave devices; waveguide lasers; metal-metal THz quantum cascade lasers; monolithically integrated Bragg reflectors; optical power; Optical device fabrication; Optical reflection; Optical waveguides; Photonic crystals; Quantum cascade lasers; Reflectivity;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6105172
