Terahertz quantum cascade emitters based on AlAs/GaAs

被引：4
|
作者：
Ulrich, J [1 ]
Strasser, G [1 ]
Unterrainer, K [1 ]
机构：
[1] Vienna Tech Univ, Inst Festkorperelektron, A-1040 Vienna, Austria
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2002年 / 13卷 / 2-4期
关键词：
terahertz; electroluminescence; quantum cascade structure; intersubband scattering;
D O I：
10.1016/S1386-9477(02)00230-8
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Quantum cascade structures designed for terahertz emission with barriers made of AlA(s) show a higher efficiency in electroluminescence measurements than those with Al0.15Ga0.85As barriers. Magnetotransport data allows us to explain this observation. We attribute the higher efficiency to an increased fraction of current undergoing the luminescent transition. There is less intersubband scattering in the binary alloy barriers than in the ternary alloy. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：900 / 903
页数：4
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