An Analysis of Modulation Experiments for Raman Optical Activity
An Analysis of Modulation Experiments for Raman Optical Activity
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拉曼旋光性调制实验分析
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
L. Barron
中科院分区：
文献类型：
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作者：
L. Hecht;L. Barron
根据Stokes-Mueller演算，讨论了拉曼旋光性和相关伪影对散射角的依赖关系，并讨论了入射激光辐射、拉曼散射光以及两者同时存在时左右圆偏振态之间的调制。后向散射中实施的入射光束调制技术被确定为最终的实验策略，用于测量在光学各向同性相中随机取向的手性分子。已经发现入射和散射光束调制技术都可以隔离纯磁偶极子对直角散射中的圆强度差的贡献，分别用于散射光束中的分析器的取向和线偏振入射辐射的方位角，与垂直方向成± 35.26°。
The dependence of Raman optical activity and the associated artifacts on the scattering angle is discussed in terms of the Stokes-Mueller calculus for the modulation between right and left circular polarization states in the incident laser radiation, in the Raman scattered light, and in both simultaneously. The incident beam modulation technique implemented in backward scattering is identified as the ultimate experimental strategy for measurements on chiral molecules randomly oriented in an optically isotropic phase. Both the incident and the scattered beam modulation techniques have been found to isolate the pure magnetic dipole contribution to the circular intensity differences in right-angle scattering for orientations of the analyzer in the scattered beam and of the azimuth of the linearly polarized incident radiation, respectively, at ∼ ± 35.26° from the vertical.