Cascaded coherent Raman scattering by phonon polaritons

We consider the cascaded part of coherent four‐wave Raman scattering in crystals without inversion symmetry as a method of spectroscopy of phonon polaritons. The theory of this effect is developed accounting for the limited dimensions of the scattering area and imaginary character of the non‐linear...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Raman spectroscopy 2000-08, Vol.31 (8-9), p.767-773
Main Authors: Kitaeva, G. Kh, Kuznetsov, K. A., Mikhailovsky, A. A., Penin, A. N.
Format: Article
Language:English
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We consider the cascaded part of coherent four‐wave Raman scattering in crystals without inversion symmetry as a method of spectroscopy of phonon polaritons. The theory of this effect is developed accounting for the limited dimensions of the scattering area and imaginary character of the non‐linear susceptibilities. The experimental results for four‐wave cascaded scattering by polaritons in crystals of LiIO3, LiNbO3 : Mg and LiNbO3 : Mg : Nd are presented. The effect of narrowing of the polariton lineshape is observed in doped LiNbO3 in the region of strong polariton absorption. The probable nature of the narrowing, connected with the excitation of the electronic states during the four‐wave mixing, is discussed. Copyright © 2000 John Wiley & Sons, Ltd.
ISSN:0377-0486
1097-4555
DOI:10.1002/1097-4555(200008/09)31:8/9<767::AID-JRS608>3.0.CO;2-J