Subpicosecond time-resolved Raman studies of LO phonons in GaN

Kong-Thon Tsen, Juliann G. Kiang, D. K. Ferry, H. Morkoç

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Subpicosecond time-resolved Raman spectroscopy has been used to measure the lifetime of the LO phonon mode in GaN at T = 300K for photoexcited electron-hole pair density ranging from 1016cm-3 to 2×019c/w-3. The lifetime has been found to decrease from 2.5 ps, at the lowest density to 0.35 ps, at the highest density. Our experimental findings should help resolve the recent controversy over the lifetime of LO phonon mode in GaN.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6473
DOIs
StatePublished - 2007
EventGallium Nitride Materials and Devices II - San Jose, CA, United States
Duration: Jan 22 2007Jan 25 2007

Other

OtherGallium Nitride Materials and Devices II
CountryUnited States
CitySan Jose, CA
Period1/22/071/25/07

Fingerprint

Phonons
Raman spectroscopy
phonons
life (durability)
Electrons

Keywords

  • Gan
  • Lifetime
  • LO phonons
  • Raman scattering

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Tsen, K-T., Kiang, J. G., Ferry, D. K., & Morkoç, H. (2007). Subpicosecond time-resolved Raman studies of LO phonons in GaN. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6473). [64730Q] https://doi.org/10.1117/12.703681

Subpicosecond time-resolved Raman studies of LO phonons in GaN. / Tsen, Kong-Thon; Kiang, Juliann G.; Ferry, D. K.; Morkoç, H.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6473 2007. 64730Q.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tsen, K-T, Kiang, JG, Ferry, DK & Morkoç, H 2007, Subpicosecond time-resolved Raman studies of LO phonons in GaN. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6473, 64730Q, Gallium Nitride Materials and Devices II, San Jose, CA, United States, 1/22/07. https://doi.org/10.1117/12.703681
Tsen K-T, Kiang JG, Ferry DK, Morkoç H. Subpicosecond time-resolved Raman studies of LO phonons in GaN. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6473. 2007. 64730Q https://doi.org/10.1117/12.703681
Tsen, Kong-Thon ; Kiang, Juliann G. ; Ferry, D. K. ; Morkoç, H. / Subpicosecond time-resolved Raman studies of LO phonons in GaN. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6473 2007.
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