Title :
High power extraction in (THz) surface-emitting lasers using type-II photonic heterostructures
Author :
Xu, G. ; Colombelli, R. ; Belarouci, A. ; Letartre, X. ; Khanna, S.P. ; Li, L.H. ; Linfield, E.H. ; Davies, A.G.
Author_Institution :
Inst. d´´Electron. Fondamentale, Univ. Paris Sud, Orsay, France
Abstract :
We report high-power, single-mode surface-emission from THz quantum cascade (QC) lasers with a type-II photonic heterostructure (PHS) resonator. Such resonator selectively excites the unusual radiative mode with significantly enhanced radiation efficiency. The PHS lasers (f ~ 3.4 THz) exhibit peak output powers of 103 mW at 20K, and the maximum operation temperature (Tmax) is 120K in pulsed mode. PHS lasers also show a directional single-lobed far-field pattern with a typical divergence angle of 20°×9°.
Keywords :
laser cavity resonators; laser modes; microwave photonics; photonic crystals; quantum cascade lasers; surface emitting lasers; PHS lasers; PHS resonator; QC lasers; THz surface-emitting lasers; directional single-lobed far-field pattern; divergence angle; frequency 3.4 THz; high power extraction; high-power single-mode surface-emission; laser output powers; operation temperature; power 103 mW; pulsed mode; radiation efficiency; radiative mode; temperature 120 K; temperature 20 K; type-Il photonic heterostructure resonator; Laser modes; Measurement by laser beam; Photonics; Power lasers; Quantum cascade lasers; Surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
