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Proceedings Paper

Quantum cascade laser progress and outlook
Author(s): Manijeh Razeghi; Jae Su Yu; Allan J. Evans; Steven Slivken; Shaban Ramezani Darvish; John Edward David; Jean Nguyen; Burc Gokden; Shahriar Khosravani
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Paper Abstract

Recent progress and outlook in quantum cascade lasers (QCLs) in the mid- to far-infrared wavelength range (3.6-16 μm) are reviewed. Our recent work has focused on the development of high-power continuous-wave (CW) QCLs emitting in wavelengths of 4.3-6.3 μm at room temperature and above. For λ~6 μm, advanced heterostructure geometries, including the use of a thick electroplated gold, epilayer-side heat sink lead to the first remarkable high-power CW QCL performance above room temperature, and a buried-ridge heterostructure are demonstrated to improve significantly laser performance (i.e., 579 mW at 298 K and operation up to 343 K) when combined with narrow laser ridges. Through re-engineering the optimized strain-balanced design, a similar excellent operation is achieved at 4.3-6.3μm. The pulse operations of the shorter wavelength (3.6-4 μm) and the long wavelength (8-16 μm) QCLs at room temperature are also demonstrated. Lastly, these results are put in the perspective of other reported results and possible future directions are discussed.

Paper Details

Date Published: 29 December 2004
PDF: 12 pages
Proc. SPIE 5617, Optically Based Biological and Chemical Sensing for Defence, (29 December 2004); doi: 10.1117/12.583530
Show Author Affiliations
Manijeh Razeghi, Northwestern Univ. (United States)
Jae Su Yu, Northwestern Univ. (United States)
Allan J. Evans, Northwestern Univ. (United States)
Steven Slivken, Northwestern Univ. (United States)
Shaban Ramezani Darvish, Northwestern Univ. (United States)
John Edward David, Northwestern Univ. (United States)
Jean Nguyen, Northwestern Univ. (United States)
Burc Gokden, Northwestern Univ. (United States)
Shahriar Khosravani, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 5617:
Optically Based Biological and Chemical Sensing for Defence
John C. Carrano; Arturas Zukauskas, Editor(s)

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