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

doi:10.1143/JPSJ.56.1881

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 journal › Article

14 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1881-1889
Number of pages	9
Journal	journal of the physical society of japan
Volume	56
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.56.1881
Publication status	Published - 1987 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Yugami, H. O., Nakashima, S. I., Hangyo, M., Mitsuishi, A., Sakai, K., Kojima, H., Sakai, K., & Kojima, H. (1987). Raman Scattering from Plasmon-LO-Phonon Coupled Modes in n-ZnSe. journal of the physical society of japan, 56(5), 1881-1889. https://doi.org/10.1143/JPSJ.56.1881

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abstract = "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.",

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AU - Yugami, Hiro O.

AU - Nakashima, Shin Ichi

AU - Hangyo, Masanori

AU - Mitsuishi, Akiyoshi

AU - Sakai, Katsuya

AU - Kojima, Haruo

AU - Sakai, Katsuya

AU - Kojima, Haruo

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N2 - 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.

AB - 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.

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