Abstract
Octopolar molecules represent a new class of molecules that are potentially useful for nonlinear-optical applications.1 However, because of the absence of a dipole moment in octopolar species, the experimental determination of the first hyperpolarizability β with the well-known elcctric-field-induced second-harmonic-generation (EFISHG) technique is impossible. The recently developed technique of hyper-Rayleigh scattering (HRS) in solution is capable of experimentally determining the values of the first hyperpolarizability [5 of nonpolar, and even of ionic, species since no orienting dc electrical field is needed in HRS.3
© 1993 Optical Society of America
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