Optical Third-Harmonic Coefficients for the Inert Gases

Abstract

Optical third-harmonic coefficients are calculated for the inert gases and are compared with recent experimental values. We find them to range from 0.9×${10}^{-39\mathrm{}}$ esu/atom for He to 222×${10}^{-39\mathrm{}}$ esu/atom for Xe. Our calculated values, expressed as ratios to the optical third-harmonic coefficient of He, compare favorably with one of two sets of recently reported experimental values.