Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN

Kong-Thon Tsen, R. P. Joshi, D. K. Ferry, A. Botchkarev, B. Sverdlov, A. Salvador, H. Morkoç

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Abstract

We report experimental measurements of nonequilibrium electron distributions as well as phonon dynamics in wurtzite GaN by using subpicosecond time-resolved Raman spectroscopy. Our experimental results have demonstrated that for electron densities n≥5×1017 cm-3, the nonequilibrium electron distributions in wurtzite GaN can be very well described by Fermi-Dirac distribution functions with the temperature of electrons substantially higher than that of the lattice. The population relaxation time of longitudinal optical phonons was directly measured to be τ5±1 ps at T=25 K.

Original languageEnglish (US)
Pages (from-to)2990-2992
Number of pages3
JournalApplied Physics Letters
Volume68
Issue number21
DOIs
StatePublished - Dec 1 1996

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Tsen, K-T., Joshi, R. P., Ferry, D. K., Botchkarev, A., Sverdlov, B., Salvador, A., & Morkoç, H. (1996). Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN. Applied Physics Letters, 68(21), 2990-2992. https://doi.org/10.1063/1.116673