Self-consistent scattering model of carrier dynamics in GaAs-AlGaAs terahertz quantum-cascade lasers

被引：23

作者：

Indjin, D ^{[1
]}

Harrison, P ^{[1
]}

Kelsall, RW ^{[1
]}

Ikonic, Z ^{[1
]}

机构：

[1] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2003年 / 15卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

electron temperature; intersubband transitions; quantum-cascade lasers; terahertz;

D O I：

10.1109/LPT.2002.805801

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Intersubband electron scattering transport in terahertz GaAs-AlGaAs quantum cascade lasers is analyzed, using a full 13-level self-consistent rate equation model. The approach includes all relevant scattering mechanisms between injector-collector and active region states in the cascade structures. Employing an energy balance equation which includes the influence of both electron longitudinal optical phonon and electron-electron scattering, the method also enables evaluation of the average electron temperature of the nonequilibrium carrier distributions in the device. The electron temperature is found to give a strong influence on the output characteristics, particularly at very low temperatures. The threshold currents and electric field-current density characteristics are in very good agreement with experiment, implying that the model has a strong predictive capability.

引用

页码：15 / 17

页数：3

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