Continuous wave operation of a superlattice quantum cascade laser emitting at 2 THz

被引：92
|
作者：
Worral, C
Alton, J
Houghton, M
Barbieri, S
Beere, HE
Ritchie, D
Sirtori, C
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Teraview Ltd, Cambridge CB4 0WS, England
来源：
OPTICS EXPRESS | 2006年 / 14卷 / 01期
关键词：
D O I：
10.1364/OPEX.14.000171
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the operation of a 2 THz quantum cascade laser based on a GaAs/Al0.1Ga0.9As heterostructure. The laser transition is between an isolated subband and the upper state of a 14 meV wide miniband. Lasing action takes place on a high order vertical mode of a 200 mu m thick double-metallic waveguide. In pulsed mode operation, with a 3.16mm long device, we report a threshold current density of 115 A/cm(2) at T = 4K, with a maximum measured peak power of 50 mW. The device shows lasing action in continuous wave up to 47K, with a maximum power in excess of 15 mW at T = 4K. (c) 2005 Optical Society of America.
引用
收藏
页码：171 / 181
页数：11
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