Effects of injector barrier on performance of terahertz quantum-cascade lasers

被引：12
|
作者：
Luo, H. [1 ]
Laframboise, S. R. [1 ]
Wasilewski, Z. R. [1 ]
Liu, H. C. [1 ]
机构：
[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada
来源：
ELECTRONICS LETTERS | 2007年 / 43卷 / 11期
关键词：
D O I：
10.1049/el:20070578
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An experimental study of the effects of injector barrier thickness on the performance of terahertz quantum-cascade lasers is reported. The injector barrier is varied from 54 to 38 A in an otherwise identical 3.4 THz laser structure. It is shown that the threshold current density at 10 K increases monotonically from 445 A/cm(2) to 1.29 kA/cm(2) with reducing barrier thickness. On the other hand, an optimum injector barrier thickness of 44 angstrom is found to give rise to a maximum lasing temperature of 141 K.
引用
收藏
页码：633 / 635
页数：3
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