An advanced strategy for the optimal design and realization of a GaAs/AlGaAs quantum-cascade laser is presented. It relies on recently established inverse scattering techniques to design an optimal smooth active region profile, followed by a conversion to an almost equivalent digitally graded structure, comprising just two different alloy compositions. In order to compare the output characteristics of optimized and previously realized structures, the intersubband electron scattering transport in quantum cascade lasers is analyzed. A full self-consistent rate equation model which includes all relevant electron-longitudinal optical phonon and electron-electron scattering mechanisms between injector/collector, active region, and continuumlike states is employed. Whilst the gain coefficients and threshold currents calculated at 77 and 300 K for the structure with a standard triple quantum well active region show excellent agreement with recent experiments, a significant improvement of thes...e parameters is predicted for the optimized digitally graded quantum-cascade laser.
TY - JOUR
AU - Indjin, Dragan
AU - Tomić, Stanko
AU - Ikonić, Zoran
AU - Harrison, Paul
AU - Kelsall, Robert W.
AU - Milanović, Vitomir
AU - Kočinac, Saša
PY - 2002
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/438
AB - An advanced strategy for the optimal design and realization of a GaAs/AlGaAs quantum-cascade laser is presented. It relies on recently established inverse scattering techniques to design an optimal smooth active region profile, followed by a conversion to an almost equivalent digitally graded structure, comprising just two different alloy compositions. In order to compare the output characteristics of optimized and previously realized structures, the intersubband electron scattering transport in quantum cascade lasers is analyzed. A full self-consistent rate equation model which includes all relevant electron-longitudinal optical phonon and electron-electron scattering mechanisms between injector/collector, active region, and continuumlike states is employed. Whilst the gain coefficients and threshold currents calculated at 77 and 300 K for the structure with a standard triple quantum well active region show excellent agreement with recent experiments, a significant improvement of these parameters is predicted for the optimized digitally graded quantum-cascade laser.
PB - Amer Inst Physics, Melville
T2 - Applied Physics Letters
T1 - Gain-maximized GaAs/AlGaAs quantum-cascade laser with digitally graded active region
EP - 2165
IS - 12
SP - 2163
VL - 81
DO - 10.1063/1.1508166
ER -
@article{
author = "Indjin, Dragan and Tomić, Stanko and Ikonić, Zoran and Harrison, Paul and Kelsall, Robert W. and Milanović, Vitomir and Kočinac, Saša",
year = "2002",
abstract = "An advanced strategy for the optimal design and realization of a GaAs/AlGaAs quantum-cascade laser is presented. It relies on recently established inverse scattering techniques to design an optimal smooth active region profile, followed by a conversion to an almost equivalent digitally graded structure, comprising just two different alloy compositions. In order to compare the output characteristics of optimized and previously realized structures, the intersubband electron scattering transport in quantum cascade lasers is analyzed. A full self-consistent rate equation model which includes all relevant electron-longitudinal optical phonon and electron-electron scattering mechanisms between injector/collector, active region, and continuumlike states is employed. Whilst the gain coefficients and threshold currents calculated at 77 and 300 K for the structure with a standard triple quantum well active region show excellent agreement with recent experiments, a significant improvement of these parameters is predicted for the optimized digitally graded quantum-cascade laser.",
publisher = "Amer Inst Physics, Melville",
journal = "Applied Physics Letters",
title = "Gain-maximized GaAs/AlGaAs quantum-cascade laser with digitally graded active region",
pages = "2165-2163",
number = "12",
volume = "81",
doi = "10.1063/1.1508166"
}
Indjin, D., Tomić, S., Ikonić, Z., Harrison, P., Kelsall, R. W., Milanović, V.,& Kočinac, S.. (2002). Gain-maximized GaAs/AlGaAs quantum-cascade laser with digitally graded active region. in Applied Physics Letters
Amer Inst Physics, Melville., 81(12), 2163-2165.
https://doi.org/10.1063/1.1508166
Indjin D, Tomić S, Ikonić Z, Harrison P, Kelsall RW, Milanović V, Kočinac S. Gain-maximized GaAs/AlGaAs quantum-cascade laser with digitally graded active region. in Applied Physics Letters. 2002;81(12):2163-2165.
doi:10.1063/1.1508166 .
Indjin, Dragan, Tomić, Stanko, Ikonić, Zoran, Harrison, Paul, Kelsall, Robert W., Milanović, Vitomir, Kočinac, Saša, "Gain-maximized GaAs/AlGaAs quantum-cascade laser with digitally graded active region" in Applied Physics Letters, 81, no. 12 (2002):2163-2165,
https://doi.org/10.1063/1.1508166 . .
