Transient picosecond/subpicosecond Raman scattering studies of nonequilibrium electron distributions and phonons in CdTe

E. Grann, Y. Chen, Kong-Thon Tsen, D. K. Ferry, T. Almeida, Y. P. Chen, J. P. Faurie, S. Sivananthan

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Nonequilibrium electron distributions and phonons in CdTe have been studied by transient picosecond/subpicosecond Raman spectroscopy at T = 300 K. Our experimental results show that for photoexcited electron-hole density of n ≅ 1018 cm-3, the electron distributions can be reasonably well described by Fermi-Dirac distribution functions with effective electron temperature substantially higher than the lattice temperature. From an ensemble Monte Carlo analysis of the nonequilibrium phonon population as a function of photoexcited electron-hole pair density, the LO phonon lifetime in CdTe has been deduced to be τ≅0.75±0.25 ps.

Original languageEnglish (US)
Pages (from-to)3840-3843
Number of pages4
JournalJournal of Applied Physics
Volume80
Issue number7
DOIs
StatePublished - Oct 1 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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