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Simulating terahertz quantum cascade lasers: Trends from samples from different labs

Winge, David LU ; Franckie, Martin LU and Wacker, Andreas LU (2016) In Journal of Applied Physics 120.
Abstract
We present a systematic comparison of the results from our non-equilibrium Green's function formalism with a large number of AlGaAs-GaAs terahertz quantum cascade lasers previously published in the literature. Employing identical material and simulation parameters for all samples, we observe that the discrepancies between measured and calculated peak currents are similar for samples from a given group. This suggests that the differences between experiment and theory are partly due to a lacking reproducibility for devices fabricated at different laboratories. Varying the interface roughness height for different devices, we find that the peak current under lasing operation hardly changes, so that differences in interface quality appear not... (More)
We present a systematic comparison of the results from our non-equilibrium Green's function formalism with a large number of AlGaAs-GaAs terahertz quantum cascade lasers previously published in the literature. Employing identical material and simulation parameters for all samples, we observe that the discrepancies between measured and calculated peak currents are similar for samples from a given group. This suggests that the differences between experiment and theory are partly due to a lacking reproducibility for devices fabricated at different laboratories. Varying the interface roughness height for different devices, we find that the peak current under lasing operation hardly changes, so that differences in interface quality appear not to be the sole reason for the lacking reproducibility. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Physics
volume
120
publisher
American Institute of Physics
external identifiers
  • scopus:84988470791
  • wos:000384573200014
DOI
10.1063/1.4962646
language
English
LU publication?
yes
id
b48a31ce-6d36-499d-a604-bf4cf7f77ee1
date added to LUP
2016-10-27 14:31:19
date last changed
2017-09-18 00:01:00
@article{b48a31ce-6d36-499d-a604-bf4cf7f77ee1,
  abstract     = {We present a systematic comparison of the results from our non-equilibrium Green's function formalism with a large number of AlGaAs-GaAs terahertz quantum cascade lasers previously published in the literature. Employing identical material and simulation parameters for all samples, we observe that the discrepancies between measured and calculated peak currents are similar for samples from a given group. This suggests that the differences between experiment and theory are partly due to a lacking reproducibility for devices fabricated at different laboratories. Varying the interface roughness height for different devices, we find that the peak current under lasing operation hardly changes, so that differences in interface quality appear not to be the sole reason for the lacking reproducibility.},
  articleno    = {114302},
  author       = {Winge, David and Franckie, Martin and Wacker, Andreas},
  language     = {eng},
  month        = {09},
  publisher    = {American Institute of Physics},
  series       = {Journal of Applied Physics},
  title        = {Simulating terahertz quantum cascade lasers: Trends from samples from different labs},
  url          = {http://dx.doi.org/10.1063/1.4962646},
  volume       = {120},
  year         = {2016},
}