Investigation of thermal properties of mid-infrared AlGaAs/GaAs quantum cascade lasers

被引：41
作者：
Pierscinski, K. [1 ]
Pierscinska, D. [1 ]
Iwinska, M. [1 ]
Kosiel, K. [1 ]
Szerling, A. [1 ]
Karbownik, P. [1 ]
Bugajski, M. [1 ]
机构：
[1] Inst Electr Mat Technol, Warsaw, Poland
来源：
JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 04期
关键词：
SPATIALLY-RESOLVED THERMOREFLECTANCE; K OPERATION; TEMPERATURE; RESISTANCE; MIRRORS;
D O I：
10.1063/1.4746791
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on detailed experimental investigation of thermal properties of AlGaAs/GaAs quantum cascade lasers (QCLs) emitting at wavelength of 9.4 mu m. Different mounting options and device geometries are compared in terms of their influence on the relative increase of the active region temperature. High resolution, spatially resolved thermoreflectance is used for mapping temperature distribution over the facet of pulse operated QCLs. The devices' thermal resistances are derived from experimental data. We also develop a numerical thermal model of QC lasers, solving heat transport equation in 2D and 3D, which includes anisotropy of thermal conductivity. By combining experimental and numerical results, an insight into thermal management in QCLs is gained. Thermal optimization of the design focuses on improving heat dissipation in the device, which is essential to increase the maximal operation temperature of the devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4746791]
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页数：12
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