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

Research output: Contribution to journalArticle

88 Citations (Scopus)

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 - 1996

Fingerprint

electron distribution
wurtzite
phonons
Raman spectroscopy
relaxation time
distribution functions
electrons
temperature

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

Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN. / Tsen, Kong-Thon; Joshi, R. P.; Ferry, D. K.; Botchkarev, A.; Sverdlov, B.; Salvador, A.; Morkoç, H.

In: Applied Physics Letters, Vol. 68, No. 21, 1996, p. 2990-2992.

Research output: Contribution to journalArticle

Tsen, K-T, Joshi, RP, Ferry, DK, Botchkarev, A, Sverdlov, B, Salvador, A & Morkoç, H 1996, 'Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN', Applied Physics Letters, vol. 68, no. 21, pp. 2990-2992. https://doi.org/10.1063/1.116673
Tsen K-T, Joshi RP, Ferry DK, Botchkarev A, Sverdlov B, Salvador A et al. Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN. Applied Physics Letters. 1996;68(21):2990-2992. https://doi.org/10.1063/1.116673
Tsen, Kong-Thon ; Joshi, R. P. ; Ferry, D. K. ; Botchkarev, A. ; Sverdlov, B. ; Salvador, A. ; Morkoç, H. / Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN. In: Applied Physics Letters. 1996 ; Vol. 68, No. 21. pp. 2990-2992.
@article{fde2efa4f71c46a4a267b13b1ddb35e5,
title = "Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN",
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.",
author = "Kong-Thon Tsen and Joshi, {R. P.} and Ferry, {D. K.} and A. Botchkarev and B. Sverdlov and A. Salvador and H. Morko{\cc}",
year = "1996",
doi = "10.1063/1.116673",
language = "English (US)",
volume = "68",
pages = "2990--2992",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "21",

}

TY - JOUR

T1 - Nonequilibrium electron distributions and phonon dynamics in wurtzite GaN

AU - Tsen, Kong-Thon

AU - Joshi, R. P.

AU - Ferry, D. K.

AU - Botchkarev, A.

AU - Sverdlov, B.

AU - Salvador, A.

AU - Morkoç, H.

PY - 1996

Y1 - 1996

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0000796986&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000796986&partnerID=8YFLogxK

U2 - 10.1063/1.116673

DO - 10.1063/1.116673

M3 - Article

AN - SCOPUS:0000796986

VL - 68

SP - 2990

EP - 2992

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 21

ER -