We investigate Raman scattering from optically deformed droplets both theoretically and experimentally. Using a dual-beam optical trap, single aqueous aerosol microdroplets are held in an environmentally controlled cell and deformed, while both input and output resonances are simultaneously excited. Our systematic investigation shows that, depending on the scattering angle and whispering gallery mode (WGM) order and polarization, drastically different line shapes can be observed. The inelastic light scattering formalism developed here accounts for the profile of the excitation beam and the nonspherical shape of the optically deformed particle. Model calculations are in good agreement with measured Raman spectra and correctly predict the splitting of WGMs in measured spectra. The experiments and model presented here enable the accurate characterization of nanometer-sized deformations in micrometer-sized particles, which has many potential applications.

中文翻译：

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从光学变形液滴产生的腔增强拉曼散射

我们在理论上和实验上研究了光学变形液滴的拉曼散射。使用双光束光阱，将单个水性气溶胶微滴保持在环境控制的单元中并变形，同时同时激发输入和输出共振。我们的系统研究表明，根据散射角和回音壁模式（WGM）的阶数和极化，可以观察到截然不同的线形。在此形成的非弹性光散射形式主义解释了激发光束的轮廓和光学变形粒子的非球形形状。模型计算与测得的拉曼光谱非常吻合，可以正确预测测得光谱中WGM的分裂。