The origins of the nonlinear refractive indices of liquids and glasses
<p>Nonlinear refractive index changes in isotropic media are a consequence of two distinct types of mechanisms. An "electronic" mechanism arises from the nonlinear distortion of the electron orbits about the nuclei and a "nuclear" mechanism arises from an electric-field-ind...
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https://thesis.library.caltech.edu/9873/1/Owyoung_a_1972.pdfOwyoung, Adelbert (1972) The origins of the nonlinear refractive indices of liquids and glasses. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/E9HM-AK76. https://resolver.caltech.edu/CaltechTHESIS:06132016-142455107 <https://resolver.caltech.edu/CaltechTHESIS:06132016-142455107>