Inoue Tomonao, Kohno Jun-Ya
Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
J Phys Chem B. 2022 Jul 28;126(29):5507-5512. doi: 10.1021/acs.jpcb.2c03414. Epub 2022 Jul 13.
Stimulated Raman scattering (SRS) in a liquid droplet enhances the Raman scattering intensity through optical resonances. We have previously used a pendant drop at the tip of a capillary as the Raman-enhancing medium. In this study, we develop a new optical cavity for SRS measurement that consists of a spherical shell of organic liquid. This enables us to extend the applicability of the pendant-drop SRS method to liquids with low viscosity or low interfacial tension. This method is used to observe low-frequency modes of liquid benzene. The results indicate that the SRS emerges locally with respect to the drop size. The developed method extends the study of liquid structures based on vibrational spectroscopy.
液滴中的受激拉曼散射（SRS）通过光学共振增强了拉曼散射强度。我们之前使用毛细管尖端的悬垂液滴作为拉曼增强介质。在本研究中，我们开发了一种用于SRS测量的新型光学腔，它由有机液体的球壳组成。这使我们能够将悬垂液滴SRS方法的适用性扩展到低粘度或低界面张力的液体。该方法用于观察液态苯的低频模式。结果表明，SRS相对于液滴尺寸局部出现。所开发的方法扩展了基于振动光谱学的液体结构研究。
