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Proceedings Paper

Continuous wave, room temperature operation of λ ~ 3um quantum cascade laser
Author(s): N. Bandyopadhyay; Y. Bai; S. Tsao; S. Nida; S. Slivken; M. Razeghi
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Paper Abstract

Quantum Cascade Lasers (QCLs), operating in continuous wave (cw) at room temperature (rt) in 3-3.5μm spectral range, which overlaps the spectral fingerprint region of many hydrocarbons, is essential in spectroscopic trace gas detection, environment monitoring, and pollution control. A 3μm QCL, operating in cw at rt is demonstrated. This initial result makes it possible, for the most popular material system (AlInAs/GaInAs on InP) used in QCLs in mid-infrared and long-infrared, to cover the entire spectral range of mid-infrared atmospheric window (3-5μm). In0.79Ga0.21As/In0.11Al0.89As strain balanced superlattice, which has a large conduction band offset, was grown. The strain was balanced with composite barriers (In0.11Al0.89As /In0.4Al0.6As) in the injector region, to eliminate the need of extremely high compressively strained GaInAs, whose pseudomorphic growth is very difficult.

Paper Details

Date Published: 4 February 2013
PDF: 9 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310M (4 February 2013); doi: 10.1117/12.2019105
Show Author Affiliations
N. Bandyopadhyay, Northwestern Univ. (United States)
Y. Bai, Northwestern Univ. (United States)
S. Tsao, Northwestern Univ. (United States)
S. Nida, Northwestern Univ. (United States)
S. Slivken, Northwestern Univ. (United States)
M. Razeghi, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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