Second-Order Raman Scattering in Alkali Fluoride Crystals

Authors

S. L. Cunningham, University of Nebraska - Lincoln
T. P. Sharma, University of Nebraska - Lincoln
Sitaram Jaswal, University of NebraskaFollow
M. Hass, University of Nebraska - Lincoln
John R. Hardy, University of Nebraska - LincolnFollow

Date of this Version

10-15-1974

Comments

Published in Physical Review Volume 10, Number 8, 15 October 1974. Copyright 1974. Used by permission.

Abstract

We present theoretical and experimental second-order Raman spectra for NaF, KF, RbF, and CsF. The theoretical calculation follows the formalism of Born and Bradburn. For the lattice-dynamic calculation we use the deformation-dipole model and present comparisons with measured dispersion curves. For the polarizability calculation, we retain all eight first-neighbor and all thirty second-neighbor polarizability coefficients. We find that, in addition to all of the first-neighbor coefficients, only three of the second-neighbor coefficients are needed to obtain good agreement between the calculated and observed spectra both as regards peak positions and over-all shape. Comparison with other types of calculations are made.