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 Citations (Scopus)

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
StatePublished - Oct 1 1996

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electron distribution
phonons
Raman spectra
Raman spectroscopy
distribution functions
electron energy
life (durability)
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Grann, E., Chen, Y., Tsen, K-T., Ferry, D. K., Almeida, T., Chen, Y. P., ... Sivananthan, S. (1996). Transient picosecond/subpicosecond Raman scattering studies of nonequilibrium electron distributions and phonons in CdTe. Journal of Applied Physics, 80(7), 3840-3843.

Transient picosecond/subpicosecond Raman scattering studies of nonequilibrium electron distributions and phonons in CdTe. / Grann, E.; Chen, Y.; Tsen, Kong-Thon; Ferry, D. K.; Almeida, T.; Chen, Y. P.; Faurie, J. P.; Sivananthan, S.

In: Journal of Applied Physics, Vol. 80, No. 7, 01.10.1996, p. 3840-3843.

Research output: Contribution to journalArticle

Grann, E, Chen, Y, Tsen, K-T, Ferry, DK, Almeida, T, Chen, YP, Faurie, JP & Sivananthan, S 1996, 'Transient picosecond/subpicosecond Raman scattering studies of nonequilibrium electron distributions and phonons in CdTe', Journal of Applied Physics, vol. 80, no. 7, pp. 3840-3843.
Grann, E. ; Chen, Y. ; Tsen, Kong-Thon ; Ferry, D. K. ; Almeida, T. ; Chen, Y. P. ; Faurie, J. P. ; Sivananthan, S. / Transient picosecond/subpicosecond Raman scattering studies of nonequilibrium electron distributions and phonons in CdTe. In: Journal of Applied Physics. 1996 ; Vol. 80, No. 7. pp. 3840-3843.
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