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Frequency modulations due to domain dynamics in terahertz quantum cascade lasers

Önder, E. LU ; Winge, D. O. LU ; Franckié, M. LU ; Forrer, A. ; Senica, U. ; Scalari, G. and Wacker, A. LU orcid (2023) In Journal of Applied Physics 133(12).
Abstract

The light output of quantum cascade lasers is strongly affected by electric field-domain oscillations if the laser shows electrical instabilities. This can result in a substantial broadening of the emission spectrum, which is investigated here by detailed simulations for a terahertz device. We explain how the light pulsation is affected by electrical injection conditions and external capacitances. Experimental data confirm that the oscillation frequencies are not essentially affected by circuit conditions, while a large external capacitance produces almost non-observable oscillations due to stabilization of the circuit.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Physics
volume
133
issue
12
article number
123101
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85150868101
ISSN
0021-8979
DOI
10.1063/5.0137716
project
Quantum Cascade Lasers beyond general paradigms
language
English
LU publication?
yes
id
e0863d7c-ea76-417c-966b-3da8bfdf36ac
date added to LUP
2023-05-23 09:52:57
date last changed
2023-11-08 06:10:01
@article{e0863d7c-ea76-417c-966b-3da8bfdf36ac,
  abstract     = {{<p>The light output of quantum cascade lasers is strongly affected by electric field-domain oscillations if the laser shows electrical instabilities. This can result in a substantial broadening of the emission spectrum, which is investigated here by detailed simulations for a terahertz device. We explain how the light pulsation is affected by electrical injection conditions and external capacitances. Experimental data confirm that the oscillation frequencies are not essentially affected by circuit conditions, while a large external capacitance produces almost non-observable oscillations due to stabilization of the circuit.</p>}},
  author       = {{Önder, E. and Winge, D. O. and Franckié, M. and Forrer, A. and Senica, U. and Scalari, G. and Wacker, A.}},
  issn         = {{0021-8979}},
  language     = {{eng}},
  number       = {{12}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Journal of Applied Physics}},
  title        = {{Frequency modulations due to domain dynamics in terahertz quantum cascade lasers}},
  url          = {{http://dx.doi.org/10.1063/5.0137716}},
  doi          = {{10.1063/5.0137716}},
  volume       = {{133}},
  year         = {{2023}},
}