Gain-maximized GaAs/AlGaAs quantum-cascade laser with digitally graded active region

2002
Authors
Indjin, Dragan
Tomić, Stanko
Ikonić, Zoran
Harrison, Paul
Kelsall, Robert W.

Milanović, Vitomir
Kočinac, Saša

Article (Published version)

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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.
Source:
Applied Physics Letters, 2002, 81, 12, 2163-2165Publisher:
- Amer Inst Physics, Melville
DOI: 10.1063/1.1508166
ISSN: 0003-6951
WoS: 000177911200007
Scopus: 2-s2.0-79956048796
Institution/Community
Tehnološko-metalurški fakultetTY - 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 . .