Accession Number : AD0678393

Title :   NONLINEAR OPTICAL EFFECTS AND SPATIAL DISPERSION IN CRYSTALS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Mashkevich,V. S.

Report Date : 21 DEC 1967

Pagination or Media Count : 12

Abstract : The author considers frequency addition as a basis for explaining the effect which spatial dispersion of nonlocalized excitations has on nonlinear optic effects in crystals. An expression is derived within the framework of perturbation theory for the probability amplitude of the three-phonon process with resonance in intermediate states, and the case where exciton states are intermediate is considered. The proposed theory is applied to addition of focused and plane waves and possible instances of spatial dispersion are studied.

Descriptors :   (*CRYSTAL LATTICES, OPTICAL PROPERTIES), NONLINEAR SYSTEMS, COHERENT RADIATION, PERTURBATION THEORY, PHONONS, EXCITONS, RUBY, USSR

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE