Novel quantum cascade lasers based on type-II multiple quantum well heterostructures

Rui Q. Yang; Shin Shem Pei; Jerry R. Meyer

doi:10.1117/12.238392

19 April 1996 Novel quantum cascade lasers based on type-II multiple quantum well heterostructures

Rui Q. Yang, Shin Shem Pei, Jerry R. Meyer

Proceedings Volume 2694, Quantum Well and Superlattice Physics VI; (1996) https://doi.org/10.1117/12.238392
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Rui Q. Yang, Shin Shem Pei, and Jerry R. Meyer "Novel quantum cascade lasers based on type-II multiple quantum well heterostructures", Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); https://doi.org/10.1117/12.238392

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