Impact of interface roughness distributions on the operation of quantum cascade lasers

被引：41

作者：

Franckie, Martin ^{[1
]}

Winge, David O. ^{[1
]}

Wolf, Johanna ^{[2
]}

Liverini, Valeria ^{[2
]}

Dupont, Emmanuel ^{[3
]}

Trinite, Virginie ^{[4
]}

Faist, Jerome ^{[2
]}

Wacker, Andreas ^{[1
]}

机构：

[1] Lund Univ, Math Phys, S-22100 Lund, Sweden

[2] ETH, ETH Inst Quantum Elect, CH-8093 Zurich, Switzerland

[3] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada

[4] III V Lab, F-91767 Palaiseau, France

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 04期

基金：

瑞典研究理事会;

关键词：

SCANNING-TUNNELING-MICROSCOPY; HETEROSTRUCTURES; SUPERLATTICES; MOBILITY; WELLS;

D O I：

10.1364/OE.23.005201

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the impact of interface roughness on the operation of mid-IR and THz quantum cascade lasers. Particular emphasis is given towards the differences between the Gaussian and exponential roughness distribution functions, for which we present results from simulation packages based on nonequilibrium Green's functions and density matrices. The Gaussian distribution suppresses scattering at high momentum transfer which enhances the lifetime of the upper laser level in mid-IR lasers. For THz lasers, a broader range of scattering transitions is of relevance, which is sensitive to the entire profile of the interface fluctuations. Furthermore we discuss the implementation of interface roughness within a two band model. (C) 2015 Optical Society of America

引用

页码：5201 / 5212

页数：12

共 31 条

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].