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

Franckie, Martin LU ; Winge, David LU ; Wolf, Johanna; Liverini, Valeria; Dupont, Emmanuel; Trinite, Virginie; Faist, Jerome and Wacker, Andreas LU (2015) In Optics Express 23(4). p.5201-5212
Abstract
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... (More)
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 (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
23
issue
4
pages
5201 - 5212
publisher
OSA
external identifiers
  • wos:000350872700130
  • scopus:84924178483
ISSN
1094-4087
DOI
10.1364/OE.23.005201
language
English
LU publication?
yes
id
90453866-7fe2-4a30-879e-e21b60342c37 (old id 5293813)
alternative location
http://www.opticsinfobase.org/oe/viewmedia.cfm?uri=oe-23-4-5201&seq=0
date added to LUP
2015-04-24 15:24:36
date last changed
2017-05-28 03:58:58
@article{90453866-7fe2-4a30-879e-e21b60342c37,
  abstract     = {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},
  author       = {Franckie, Martin and Winge, David and Wolf, Johanna and Liverini, Valeria and Dupont, Emmanuel and Trinite, Virginie and Faist, Jerome and Wacker, Andreas},
  issn         = {1094-4087},
  language     = {eng},
  number       = {4},
  pages        = {5201--5212},
  publisher    = {OSA},
  series       = {Optics Express},
  title        = {Impact of interface roughness distributions on the operation of quantum cascade lasers},
  url          = {http://dx.doi.org/10.1364/OE.23.005201},
  volume       = {23},
  year         = {2015},
}