Role of Molecular Interaction in Anisotropic Light Scattering by Liquids

摘要

The influence of molecular linear and nonlinear polarizability, anisotropy, shape, radial and angular correlations, and other microscopic factors on anisotropic light scattering is discussed for some models of a liquid within the framework of statisticalmdash;molecular theory. An effective optical anisotropy Dgr;2is introduced and computed numerically for several liquids from the experimental depolarization ratioDuand optical birefringence constantBlgr;; for strongly anisotropic substances, this yields Dgr;2values almost twice smaller than those determined from the anisotropic Rayleigh ratioRanis. Theoretical, numerical computations of Dgr;2basing on the ellipsoidal Lorentz and Onsagermdash;Scholte models result in values close to those fromDuandBlgr;. Finally, the isotropic and anisotropic parts of the refractive index variation due to intense laser light are related, respectively, with the isotropic and anisotropic Rayleigh ratios, by means of which numerical computations are made for various liquids.