Raman scattering spectra of B2-polariton and B2 (LO) modes in paraelectric KDP
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 + ∆ y and z( xy) z̄ 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.
- Publication:
-
Solid State Communications
- Pub Date:
- September 1978
- DOI:
- 10.1016/0038-1098(78)91575-2
- Bibcode:
- 1978SSCom..27.1375T