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Temperature dependent nonlinear response of quantum cascade structures

Winge, David LU and Wacker, Andreas LU (2014) In Optical and Quantum Electronics 46(4). p.533-539
Abstract
Current response and gain spectrum of a terahertz quantum cascade laser is analyzed at different temperatures by a nonequilibrium Green's functions approach. The simulations are compared to recent results of time domain spectroscopy. Being able to retrieve higher harmonics of the response function, nonlinear phenomena in quantum cascade lasers are studied theoretically. For different temperatures, gain is simulated under operating conditions and related to the intensity inside the cavity, showing the degradation of performance with temperature. Resolving the electron densities in energy shows the breakdown of inversion at high intensities.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Terahertz, Quantum cascade lasers, Gain simulations, Nonlinear response, Gain clamping
in
Optical and Quantum Electronics
volume
46
issue
4
pages
533 - 539
publisher
Springer
external identifiers
  • wos:000332094900006
  • scopus:84895928383
ISSN
0306-8919
DOI
10.1007/s11082-013-9779-9
language
English
LU publication?
yes
id
2d922236-5f7f-424b-967e-10c86c7c89c8 (old id 4417542)
date added to LUP
2014-04-30 11:54:41
date last changed
2017-01-01 06:14:55
@article{2d922236-5f7f-424b-967e-10c86c7c89c8,
  abstract     = {Current response and gain spectrum of a terahertz quantum cascade laser is analyzed at different temperatures by a nonequilibrium Green's functions approach. The simulations are compared to recent results of time domain spectroscopy. Being able to retrieve higher harmonics of the response function, nonlinear phenomena in quantum cascade lasers are studied theoretically. For different temperatures, gain is simulated under operating conditions and related to the intensity inside the cavity, showing the degradation of performance with temperature. Resolving the electron densities in energy shows the breakdown of inversion at high intensities.},
  author       = {Winge, David and Wacker, Andreas},
  issn         = {0306-8919},
  keyword      = {Terahertz,Quantum cascade lasers,Gain simulations,Nonlinear response,Gain clamping},
  language     = {eng},
  number       = {4},
  pages        = {533--539},
  publisher    = {Springer},
  series       = {Optical and Quantum Electronics},
  title        = {Temperature dependent nonlinear response of quantum cascade structures},
  url          = {http://dx.doi.org/10.1007/s11082-013-9779-9},
  volume       = {46},
  year         = {2014},
}