TY - JOUR
T1 - Raman Scattering from Plasmon-LO-Phonon Coupled Modes in n-ZnSe
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
PY - 1987
Y1 - 1987
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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U2 - 10.1143/JPSJ.56.1881
DO - 10.1143/JPSJ.56.1881
M3 - Article
AN - SCOPUS:0642371773
VL - 56
SP - 1881
EP - 1889
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 5
ER -