Raman Scattering from Plasmon-LO-Phonon Coupled Modes in n-ZnSe

Hiro O. Yugami, Shin Ichi Nakashima, Masanori Hangyo, Akiyoshi Mitsuishi, Katsuya Sakai, Haruo Kojima, Katsuya Sakai, Haruo Kojima

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Raman scattering spectra from plasmon-LO-phonon coupled modes in n-ZnSe crystals have been measured. Upper- and lower-branches of the coupled modes have been observed clearly in polarized Raman spectra. It is found that the scattering intensity of the coupled modes depends on the magnitude of the momentum transfer of electrons. This result indicates that the charge density fluctuation mechanism as well as the deformation potential and electro-optic mechanisms contribute to the Raman scattering from the coupled modes in ZnSe. Calculated line-shapes reproduce the observed spectra well. From the line-shape fitting, carrier concentration and plasmon damping constant are determined.

Original languageEnglish
Pages (from-to)1881-1889
Number of pages9
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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