Optical phonon decay in bulk aluminum nitride

D. Y. Song, M. Holtz, A. Chandolu, S. A. Nikishin, E. N. Mokhov, Yu Makarov, H. Helava

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Abstract

We report Raman studies of the E 2 2 and A 1(LO) symmetry phonons of bulk A1N from 13 to 375 K. Based on observed dependences of the phonon energies and linewidths, and accounting for the temperature-dependent thermal expansion, we determine that both phonon lifetimes are limited by two-phonon decay. The E 2 2 decays symmetrically. The A 1(LO) asymmetrically decays into vibrations with energies 586 and 309 cm -1 which we attribute to A 1(TO) and LA phonons from the M point of the Brillouin zone.

Original languageEnglish
Article number021901
JournalApplied Physics Letters
Volume89
Issue number2
DOIs
StatePublished - 2006

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