Improved thermal management of mid-IR quantum cascade lasers

被引：33
|
作者：
Spagnolo, Vincenzo [1 ,2 ]
Lops, Antonia [1 ,3 ]
Scamarcio, Gaetano [1 ,3 ]
Vitiello, Miriam S. [1 ,3 ]
Di Franco, Cinzia [1 ]
机构：
[1] CNR, INFM, Reg Lab LIT3, I-70126 Bari, Italy
[2] Politecn Bari, Dipartimento Interateneo Fis, I-70126 Bari, Italy
[3] Univ Bari, Dipartimento Interateneo Fis, I-70126 Bari, Italy
来源：
JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 04期
关键词：
D O I：
10.1063/1.2840136
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We compared the thermal performance of mid-IR GaInAs/AlInAs quantum cascade lasers (QCLs) having identical gain medium, but different heat sinking configurations. By using a two-dimensional anisotropic thermal model, we have calculated the temperature profiles and the heat flow patterns of ridge waveguide QCLs, either buried or planarized, and mounted substrate-side or epilayer-side down. Device planarization with Y2O3:Si3N4 dielectric layers gives an similar to 7% reduction of the device thermal resistance with respect to InP buried heterostructures. If this planarization is combined with thick gold electroplating and epilayer-side mounting of the device, the thermal resistance is reduced by similar to 34% and similar to 50%, respectively, with respect to conventional ridge waveguide structures. (c) 2008 American Institute of Physics.
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页数：5
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