Erokhin Alexander I, Smetanin Igor V, Mikhailov Sergey I, Bulychev Nikolay A
Opt Lett. 2018 Apr 1;43(7):1570-1573. doi: 10.1364/OL.43.001570.
Stimulated Rayleigh-Mie scattering (SRMS) in two-photon absorption liquids is realized by a Fourier-transform-limited pulsed Nd-glass laser. For the first time, to the best of our knowledge, we have measured anti-Stokes spectral shifts of SRMS in toluene and hexane colloids of Ag nanoparticles, as well as in pure toluene. These values appreciably exceed the Rayleigh line width in those liquids. The four-wave mixing method is applied both experimentally and theoretically to display the process as Rayleigh-induced parametric generation. We show that the amplification effect is provided predominantly by thermally induced coherent polarization oscillations, while an interference-assisted thermal grating provides formation of a self-induced optical cavity inside the interaction region.
在双光子吸收液体中，受激瑞利 - 米氏散射（SRMS）是由傅里叶变换极限脉冲钕玻璃激光器实现的。据我们所知，我们首次测量了银纳米颗粒的甲苯和己烷胶体以及纯甲苯中SRMS的反斯托克斯光谱位移。这些值明显超过了那些液体中的瑞利线宽。实验和理论上都应用了四波混频方法来将该过程展示为瑞利诱导的参量产生。我们表明，放大效应主要由热诱导的相干极化振荡提供，而干涉辅助热光栅在相互作用区域内提供了自诱导光学腔的形成。
