The second hyperpolarizability ($\gamma$) of carbon disulfide (${{\rm CS}_2}$) is measured by gas-phase electric-field-induced second-harmonic generation for laser wavelengths in the range 765–1064 nm. The observed hyperpolarizability is decomposed into electronic (${\gamma ^e}$) and vibrational (${\gamma ^v}$) contributions, and the dispersion curve for ${\gamma ^e}$ is extrapolated to the static limit, with the result of $\gamma _0^e = 12558 \pm 93$ atomic units $= 7.83 \pm 0.06 \times {10^{- 61}}\,{{\rm C}^4}{{\rm m}^4}{{\rm J}^{- 3}} = 6.33 \pm 0.05 \times {10^{- 36}}$ esu (Taylor series convention). The results of this experiment agree with other recent nonlinear optical measurements and theoretical calculations.

中文翻译：

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测量CS ₂蒸气的超极化率色散

二硫化碳（$ {{\ rm CS} _2} $）的第二次超极化率（$ \ gamma $）是通过气相电场诱导的二次谐波产生的，测量的波长为765-1064 nm。观察到的超极化率分解为电子（$ {\ gamma ^ e} $）和振动（$ {\ gamma ^ v} $）贡献，并且将$ {\ gamma ^ e} $的色散曲线外推到静态极限，结果$ \ gamma _0 ^ e = 12558 \ pm 93 $原子单位$ = 7.83 \ pm 0.06 \ times {10 ^ {-61}} \，{{\ rm C} ^ 4} {{\ rm m} ^ 4} {{\ rm J} ^ {-3}} = 6.33 \ pm 0.05 \ times {10 ^ {-36}} $esu（Taylor系列惯例）。该实验的结果与其他最近的非线性光学测量和理论计算相吻合。