Abstract
Subpicosecond time-resolved Raman spectroscopy has been employed to investigateelectron–phonon interactions and phonon dynamics in InN. The electron–longitudinaloptical phonon scattering rate and the decay dynamics of longitudinal optical phonons inInN have been directly measured. Our results indicate that hot-phonon effects can play animportant role in the electron relaxation and transport in InN. The carrier dependence ofthe lifetime of the longitudinal optical phonons has also been measured. The resultssuggest that more theoretical work is needed to account for the dependence ofthe lifetime of longitudinal optical phonons on the photoexcited carrier density.
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