NONLINEAR OPTICAL EFFECTS AND SPATIAL DISPERSION IN CRYSTALS,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
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.