Journal
APPLIED PHYSICS LETTERS
Volume 86, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1940124
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We report on the Raman analysis of A(1)(LO) (longitudinal optical) and E-2 phonon lifetimes in InN and their temperature dependence from 80 to 700 K. Our experimental results show that among the various possible decay channels, the A(1)(LO) phonon decays asymmetrically into a high energy and a low energy phonon, whereas the E-2 phonon predominantly decays into three phonons. Possible decay channels of the A(1)(LO) phonon may involve combinations of transverse optical and acoustic phonons. Phonon lifetimes of 1.3 and 4 ps were measured at 80 K for the A(1)(LO) and the E-2 phonons, respectively. This rather long A(1)(LO) phonon lifetime suggests that hot phonon effects will play a role in InN for carrier relaxation. (c) 2005 American Institute of Physics.
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