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Proceedings Paper

Novel quantum cascade lasers based on type-II multiple quantum well heterostructures
Author(s): Rui Q. Yang; Shin Shem Pei; Jerry R. Meyer
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Paper Abstract

A new class of quantum cascade lasers based on type-II quantum wells is analyzed. In these novel mid- and long-wavelength IR lasers, not only can a population inversion be easily created with a nearly 100% current injection efficiency, but also the nonradiative loss from the optical phonon scattering can be greatly suppressed. A general description of how the lasing threshold current depends on the injection, radiative, and inversion efficiencies is formulated to illustrate the expected improvements over the recently reported quantum cascade laser. Also, the features that distinguish quantum cascade lasers from traditional bipolar lasers are discussed in the contest of the carrier transport in equivalent circuit models to illustrate the advantages of quantum cascade lasers for high power mid- and long-wavelength IR source applications.

Paper Details

Date Published: 19 April 1996
PDF: 11 pages
Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); doi: 10.1117/12.238392
Show Author Affiliations
Rui Q. Yang, Univ. of Houston (United States)
Shin Shem Pei, Univ. of Houston (United States)
Jerry R. Meyer, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 2694:
Quantum Well and Superlattice Physics VI
Gottfried H. Doehler; Theodore S. Moise, Editor(s)

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