Phonons, electron-phonon interactions, and phonon-phonon interactions in III-V nitrides

Leah Bergman; Mitra Dutta; Ki Wook Kim; Paul G. Klemens; Sergiy Mikhailovich Komirenko; Michael A. Stroscio

doi:10.1117/12.381450

28 March 2000 Phonons, electron-phonon interactions, and phonon-phonon interactions in III-V nitrides

Leah Bergman, Mitra Dutta, Ki Wook Kim, Paul G. Klemens, Sergiy Mikhailovich Komirenko, Michael A. Stroscio

Proceedings Volume 3940, Ultrafast Phenomena in Semiconductors IV; (2000) https://doi.org/10.1117/12.381450
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

Fundamental properties of phonons in III-V nitrides are examined with a view toward understanding processes important in the operation of III-V nitride devices. Firstly, confined, interface and propagating modes in wurtzite quantum wells are described in terms of Loudon's model for uniaxial semiconductors and the dielectric continuum model. Basic properties of the phonon modes and carrier-phonon interactions are considered in the basis of this treatment of dimensionally-confined phonons in wurtzite structures. A key feature of these phonon modes is their enhanced dispersion and its origin from the non-isotropic nature of the wurtzites. As will be discussed, this dispersion has important consequences for phonon propagation and phonon energy spectra. Secondly, the second-order phonon decay process of combined point defect scattering and anharmonic decay is examined as a means of estimating line broadening associated with the decay of phonons in III-V nitrides of wurtzite structure containing point defects. Thirdly, an analysis of Raman linewidths measured for AlN and GaN wurtzites is made to estimate phonon lifetimes.

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Leah Bergman, Mitra Dutta, Ki Wook Kim, Paul G. Klemens, Sergiy Mikhailovich Komirenko, and Michael A. Stroscio "Phonons, electron-phonon interactions, and phonon-phonon interactions in III-V nitrides", Proc. SPIE 3940, Ultrafast Phenomena in Semiconductors IV, (28 March 2000); https://doi.org/10.1117/12.381450

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