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Proceedings Paper

High-power continuous-wave mid-infrared quantum cascade lasers based on strain-balanced heterostructures
Author(s): M. Razeghi; A. Evans; S. Slivken; J. S. Yu; J. G. Zheng; V. P. Dravid
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Paper Abstract

Limiting factors for short-wavelength QCL designs are discussed, and a model is described to predict the short-wavelength limit for strain-balanced QCL structures. High performance is predicted at wavelengths as short as 3.0mm based on a conduction band offset of 0.9 eV in the GaInAs/AlInAs materials. Recent work is presented on the growth of strained materials using gas-source molecular beam epitaxy to investigate the model predictions. Advanced material characterization, including HR-STEM, high-resolution x-ray diffraction, photoluminescence, atomic force microscopy, and wafer-scale uniformity and repeatability are demonstrated for strain-balanced QCL structures. Laser testing results are presented for QCLs operating at ~4.8mm, and lastly, predictions for further performance improvement at short wavelengths are discussed.

Paper Details

Date Published: 7 July 2005
PDF: 10 pages
Proc. SPIE 5840, Photonic Materials, Devices, and Applications, (7 July 2005); doi: 10.1117/12.607576
Show Author Affiliations
M. Razeghi, Northwestern Univ. (United States)
A. Evans, Northwestern Univ. (United States)
S. Slivken, Northwestern Univ. (United States)
J. S. Yu, Northwestern Univ. (United States)
J. G. Zheng, Northwestern Univ. (United States)
V. P. Dravid, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 5840:
Photonic Materials, Devices, and Applications
Goncal Badenes; Derek Abbott; Ali Serpenguzel, Editor(s)

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