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Proceedings Paper

Thermal modeling of quantum cascade lasers with 3D anisotropic heat transfer analysis
Author(s): Farhat Abbas; Binay J. Pandey; Kevin Clark; Kevin Lascola; Yamac Dikmelik; Dennis Robbins; David Hinojos; Kimari L. Hodges; Katy Roodenko; Qing Gu
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Paper Abstract

Although Quantum cascade lasers (QCLs) are frequently used in sensing, spectroscopy, and free space communication applications, their poor thermal properties lead to high temperature gradients in the devices. To diagnose failure mechanisms of mid-wave infrared (MWIR) QCLs, it is critical to understand their thermal generation and transport characteristics. In this work, we use 3D anisotropic steady state heat transfer analysis to investigate the thermal behavior in lattice matched InP/InAlAs/InGaAs buried heterostructure (Bh) mounted epi-layer side down QCLs. We introduce anisotropic thermal conductivities in the in-plane and cross-plane directions in QCL’s superlattice active region, and study the temperature distribution inside the laser. We consider several configurations, including the overhanging of the laser chip on the submount by different amounts, the choice of front facet dielectric coating materials and their thicknesses, and the width of the active region. Combining these effects, we optimize QCL’s thermal performance. This work aims to provide guidelines for the design of durable QCLs as well as to help diagnose QCL failure mechanisms.

Paper Details

Date Published: 31 January 2020
PDF: 6 pages
Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 1128808 (31 January 2020); doi: 10.1117/12.2543594
Show Author Affiliations
Farhat Abbas, The Univ. of Texas at Dallas (United States)
Binay J. Pandey, Max-IR Labs. (United States)
Kevin Clark, Max-IR Labs. (United States)
Kevin Lascola, Thorlabs Quantum Electronics (United States)
Yamac Dikmelik, Thorlabs Quantum Electronics (United States)
Dennis Robbins, Max-IR Labs. (United States)
David Hinojos, Max-IR Labs. (United States)
Kimari L. Hodges, Max-IR Labs. (United States)
Katy Roodenko, The Univ. of Texas at Dallas (United States)
Max-IR Labs. (United States)
Qing Gu, The Univ. of Texas at Dallas (United States)

Published in SPIE Proceedings Vol. 11288:
Quantum Sensing and Nano Electronics and Photonics XVII
Manijeh Razeghi; Jay S. Lewis; Giti A. Khodaparast; Pedram Khalili, Editor(s)

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