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首页> 外文期刊>The Journal of Chemical Physics >Off resonance second order optical activity of isotropic layers of chiral molecules: Observation of electric and magnetic contributions
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Off resonance second order optical activity of isotropic layers of chiral molecules: Observation of electric and magnetic contributions

机译：手性分子各向同性层的非共振二阶光学活性：电和磁贡献的观察

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We perform nonresonant surface second harmonic reflection from an isotropic layer of a chiral pentamethinium salt. The combination of gated integration and photon counting techniques allows for a very high sensitivity of our experimental setup. We measure a second harmonic optical rotation angle of 5 degrees, as well as linear and circular dichroisms of 5% to 140%. We quantitatively compare these three experimental techniques and obtain a good agreement. The nonresonant configuration of our experiments enables us to distinguish between electric and magnetic contributions to the second order optical activity. The nonvanishing circular dichroism, as well as the nonvanishing s-polarized second harmonic signal with s-polarized fundamental beam, indicates that electric and magnetic effects are of the same order of magnitude. (C) 1998 American Institute of Physics. [References: 19]
机译：我们从手性五甲亚胺盐的各向同性层进行非共振表面二次谐波反射。门控积分和光子计数技术的结合使我们的实验装置具有很高的灵敏度。我们测量了5度的二次谐波光学旋转角，以及5％至140％的线性和圆形二向色性。我们定量比较这三种实验技术并获得良好的协议。我们实验的非共振配置使我们能够区分对第二级光学活动的电磁贡献。圆二色性消失，以及带有s极化基波的s极化二次谐波消失，表明电效应和磁效应具有相同的数量级。 （C）1998美国物理研究所。 [参考：19]

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