ANISOTROPY-INDUCED POLARIZATION EFFECTS IN HARMONIC GENERATION BY AN ABSORPTIVE MEDIUM

摘要

The introduction of anisotropy into a generating medium (e. g., by means of a static electric field) permits significant control cver the polarization properties of harmonics. Elliptic dichroism provides a unique case in the analysis of harmonic generation of measuring an effect which depends on the sign of thehelicity of an elliptically-polarized laser beam. The predicted polariza- tion effects allow the direct determination of the interference between real and imaginary(dissipative)parts of the nonlinear susceptibilities, which is useful for distinguishing between different models of ionization and harmonic generation by atoms in strong fields.