Abstract
A variety of semiconductor materials have been used to fabricate diode lasers for the midinfrared. Lasers using the lead salts (e.g. PbSnTe) have been commercially available for some time. Mid-infrared emitting III-V semiconductors (e.g. InGaAsSb) have superior thermal conductivity, and diode lasers fabricated from these materials offer higher powers. Of particular interest are the III-V semiconductor lasers based on type-II superlattices (e.g. InAs/GaInSb). Among the many unique properties attributed to type-Il superlattices are small hole mass, reduced Auger recombination, and less inter-valence band absorption - all important for better lasers. Recent results with Quantum Cascade-type lasers are also very encouraging. This paper summarizes the important semiconductor materials for mid-infrared lasers with emphasis on the type-II superlattices.
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Acknowledgement
I would like to acknowledge Linda West, Tom Hasenberg, Richard Miles, David Chow, Tom Boggess, and Michael Flatté for their work on type-II superlattice lasers. Work onMID-IR lasers at the Hughes Research Laboratories was supported in part by the Air Force Phillips Laboratory under Contract No. F29601-93-C-0037.
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Kost, A.R. Materials for Mid-Infrared Semiconductor Lasers. MRS Online Proceedings Library 484, 3–10 (1997). https://doi.org/10.1557/PROC-484-3
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DOI: https://doi.org/10.1557/PROC-484-3