Journal article
Effect of waveguide sidewall roughness on the threshold current density and slope efficiency of quantum cascade lasers
Applied physics letters, Vol.93(3), pp.031104-031104-3
07/21/2008
DOI: 10.1063/1.2962984
Abstract
We report on a study to determine the effect of waveguide sidewall roughness on quantum cascade (QC) laser performance using two two-wavelength heterogeneous QC laser structures, one with emission wavelengths of
7.0
μ
m
∕
11.2
μ
m
, and the other with
8.7
μ
m
∕
12.0
μ
m
. For the range of roughness standard deviation values from about
0.4
to
1.0
μ
m
, for which all four QC lasers were operating, the threshold current density increases by 12%-15% and the slope efficiency decreases by 30%-70% with stronger performance degradation for the shorter wavelength lasers, which is in agreement with a model based on Rayleigh scattering.
Details
- Title: Subtitle
- Effect of waveguide sidewall roughness on the threshold current density and slope efficiency of quantum cascade lasers
- Creators
- Fatima Toor - Princeton UniversityDeborah Sivco - NokiaHao Liu - Princeton UniversityClaire Gmachl - Princeton University
- Resource Type
- Journal article
- Publication Details
- Applied physics letters, Vol.93(3), pp.031104-031104-3
- Publisher
- American Institute of Physics
- DOI
- 10.1063/1.2962984
- ISSN
- 0003-6951
- eISSN
- 1077-3118
- Grant note
- NSF
- Date published
- 07/21/2008
- Academic Unit
- Physics and Astronomy; Electrical and Computer Engineering; Iowa Technology Institute; Holden Comprehensive Cancer Center
- Record Identifier
- 9984197296102771
Metrics
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