Raman scattering spectra of B2-polariton and B2 (LO) modes in paraelectric KDP |
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| Authors: | Y. Tominaga T. Nakamura |
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| Affiliation: | 1. The Institute for Solid State Physics, University of Tokyo, 7-22-1, Roppongi, Minato-ku, Tokyo, Japan |
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| Abstract: | The first observation of B2-polariton and B2 (LO) modes in the paraelectric phase of KDP has been made by the z(xy)z + Δy and z(xy)z? Raman scattering experiments, respectively. The B2-polariton (θ = 0.20–0.48°) spectra has revealed both the Stokes and anti-Stokes peaks. The LO-mode which is nearly critically damped has been observed. From these results the lowest B2 mode spectrum obtained by the y(xy)x Raman scattering has been reconfirmed to be oscillatory in nature, that is, a transverse optical phonon excitation. |
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