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Stokes and anti‐stokes scattering of light by low‐frequency polaritons in LiIO 3
Author(s) -
Kulevsky L. A.,
Polivanov YU. N.,
Poluektov S. N.
Publication year - 1976
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250050307
Subject(s) - polariton , raman scattering , dielectric , optics , raman spectroscopy , laser , transverse plane , attenuation , materials science , physics , atomic physics , optoelectronics , structural engineering , engineering
Results are presented on near‐forward Raman scattering from low‐frequency polaritons in LiIO 3 obtained by the photographic method using an iodine filter for attenuation of the laser light before it enters a spectrograph. Our experiment shows that the value of dielectric transition strength of the 238 cm −1 phonon mode measured by Otaguro et al. must be corrected. The clamped dielectric constant (ϵ z = 5.9) was determined from polariton measurements at frequencies below the lowest transverse mode. This value is compared with those published elsewhere.