Influence of interface roughness in quantum cascade lasers
Krivas, K. A. ; Winge, David LU ; Franckie, Martin LU and Wacker, Andreas LU
(2015)
In Journal of Applied Physics
118(11).
- Abstract
- We use a numerical model based on non-equilibrium Green's functions to investigate the influence of interface roughness (IFR) scattering in terahertz quantum cascade lasers. We confirm that IFR is an important phenomenon that affects both current and gain. The simulations indicate that IFR causes a leakage current that transfers electrons from the upper to the lower laser state. In certain cases, this current can greatly reduce gain. In addition, individual interfaces and their impact on the renormalized single particle energies are studied and shown to give both blue-and red-shifts of the gain spectrum. (C) 2015 AIP Publishing LLC.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8062355
- author
- Krivas, K. A.
; Winge, David
LU
; Franckie, Martin
LU
and Wacker, Andreas
LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Applied Physics
- volume
- 118
- issue
- 11
- article number
- 114501
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000361843300024
- scopus:84942015425
- ISSN
- 0021-8979
- DOI
- 10.1063/1.4930572
- project
- Modeling Quantum Cascade Lasers: the Challenge of Infra-Red Devices
- language
- English
- LU publication?
- yes
- id
- 04f574c4-0898-420e-8c58-c242b3d1620c (old id 8062355)
- date added to LUP
- 2016-04-01 11:05:52
- date last changed
- 2023-08-31 18:33:41
@article{04f574c4-0898-420e-8c58-c242b3d1620c,
abstract = {{We use a numerical model based on non-equilibrium Green's functions to investigate the influence of interface roughness (IFR) scattering in terahertz quantum cascade lasers. We confirm that IFR is an important phenomenon that affects both current and gain. The simulations indicate that IFR causes a leakage current that transfers electrons from the upper to the lower laser state. In certain cases, this current can greatly reduce gain. In addition, individual interfaces and their impact on the renormalized single particle energies are studied and shown to give both blue-and red-shifts of the gain spectrum. (C) 2015 AIP Publishing LLC.}},
author = {{Krivas, K. A. and Winge, David and Franckie, Martin and Wacker, Andreas}},
issn = {{0021-8979}},
language = {{eng}},
number = {{11}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Journal of Applied Physics}},
title = {{Influence of interface roughness in quantum cascade lasers}},
url = {{https://lup.lub.lu.se/search/files/21232054/krivas_JAP2015.pdf}},
doi = {{10.1063/1.4930572}},
volume = {{118}},
year = {{2015}},
}