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Fingerprints of spatial charge transfer in Quantum Cascade Lasers

Nelander, Rikard LU ; Wacker, Andreas LU ; Pereira, M. F.; Revin, D. G.; Soulby, M. R.; Wilson, L. R.; Cockburn, J. W.; Krysa, A. B.; Roberts, J. S. and Airey, R. J. (2007) In Journal of Applied Physics 102. p.1-113104
Abstract
We show that mid-infrared transmission spectroscopy of a quantum cascade laser provides clear-cut information on changes in charge location at different bias. Theoretical simulations of the evolution of the gain/absorption spectrum for a lambda~7.4 µm InGaAs/AlInAs/InP quantum cascade laser have been compared with the experimental findings. Transfer of electrons between the ground states in the active region and the states in the injector goes hand in hand with a decrease of discrete intersubband absorption peaks and an increase of broad, high-energy absorption toward the continuum delocalized states above the barriers.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Physics
volume
102
pages
1 - 113104
publisher
American Institute of Physics
external identifiers
  • wos:000251678800005
  • scopus:37249088523
DOI
10.1063/1.2817471
language
English
LU publication?
yes
id
ccdb9a8f-f0a4-4d69-acce-549277651db7 (old id 764060)
date added to LUP
2007-12-17 18:05:06
date last changed
2017-09-10 05:03:16
@article{ccdb9a8f-f0a4-4d69-acce-549277651db7,
  abstract     = {We show that mid-infrared transmission spectroscopy of a quantum cascade laser provides clear-cut information on changes in charge location at different bias. Theoretical simulations of the evolution of the gain/absorption spectrum for a lambda~7.4 µm InGaAs/AlInAs/InP quantum cascade laser have been compared with the experimental findings. Transfer of electrons between the ground states in the active region and the states in the injector goes hand in hand with a decrease of discrete intersubband absorption peaks and an increase of broad, high-energy absorption toward the continuum delocalized states above the barriers.},
  author       = {Nelander, Rikard and Wacker, Andreas and Pereira, M. F. and Revin, D. G. and Soulby, M. R. and Wilson, L. R. and Cockburn, J. W. and Krysa, A. B. and Roberts, J. S. and Airey, R. J.},
  language     = {eng},
  pages        = {1--113104},
  publisher    = {American Institute of Physics},
  series       = {Journal of Applied Physics},
  title        = {Fingerprints of spatial charge transfer in Quantum Cascade Lasers},
  url          = {http://dx.doi.org/10.1063/1.2817471},
  volume       = {102},
  year         = {2007},
}