Abstract We report the extension of our formerly developed two-beam 3-color broadband coherent Raman methodology and the improvement of our tabletop system for fully polarization controlled low-frequency vibrational measurements. Each of the differently polarized partial signal in the coherent Raman scattering could be effectively eliminated at the theoretically predicted polarization analyzer orientations. The electronic contribution to the signal was suppressed without significantly reducing the vibrational contribution to the spectrum, which is a noteworthy advantage compared to Coherent anti-Stokes Raman Spectroscopy (CARS). The method was applied for well-characterized liquid CCl4 and CHCl3 samples for the first time. Coherent vibrational spectra were recorded simultaneously on the Stokes and anti-Stokes spectral-domain located near the zero frequency shift region. The methodology is easily extendable to measure vibrational or phonon spectra of anisotropic crystals.

中文翻译：

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两光束三色宽带相干拉曼显微光谱 (3CBCRS) 中的有效偏振抑制

摘要 我们报告了我们以前开发的两光束三色宽带相干拉曼方法的扩展以及我们用于完全偏振控制的低频振动测量的桌面系统的改进。在理论预测的偏振分析仪方向上，相干拉曼散射中的每一个不同偏振的部分信号都可以被有效地消除。对信号的电子贡献被抑制，而不会显着降低对光谱的振动贡献，与相干反斯托克斯拉曼光谱 (CARS) 相比，这是一个值得注意的优势。该方法首次应用于表征良好的液态 CCl4 和 CHCl3 样品。在位于零频移区域附近的斯托克斯和反斯托克斯谱域上同时记录相干振动谱。该方法很容易扩展到测量各向异性晶体的振动或声子光谱。