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Proceedings Paper

Numerical simulation of III-nitride lattice-matched structures for quantum cascade lasers
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Paper Abstract

We present a comparison among GaN/AlGaN, GaN/InAlGaN, and GaAs/AlGaAs quantum cascade structures based on a Monte Carlo study of carrier dynamics, to highlight the improvements offered by nitride latticematched structures. We take into account the interactions of electrons with other electrons as well as LO-phonons. The results obtained from the Monte Carlo simulations are used to calculate the population inversion of each structure to determine its temperature dependence. This study shows that the nitride-based structures offer significantly improved high-temperature performance compared to the GaAs device, including the possibility of room-temperature operation. Furthermore, by virtue of its lattice-matched nature, the GaN/InAlGaN materials system can potentially enable the high-quality growth of thick quantum cascade structures without plastic relaxation, as a way to overcome the structural issues that have so far hindered the development of these devices with nitride semiconductors.

Paper Details

Date Published: 7 March 2014
PDF: 7 pages
Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 89800T (7 March 2014); doi: 10.1117/12.2040709
Show Author Affiliations
Sara Shishehchi, Boston Univ. (United States)
Roberto Paiella, Boston Univ. (United States)
Enrico Bellotti, Boston Univ. (United States)

Published in SPIE Proceedings Vol. 8980:
Physics and Simulation of Optoelectronic Devices XXII
Bernd Witzigmann; Marek Osiński; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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