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首页> 外文期刊>The Journal of Chemical Physics >Coupled wave equations theory of surface-enhanced femtosecond stimulated Raman scattering
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Coupled wave equations theory of surface-enhanced femtosecond stimulated Raman scattering

机译：表面增强飞秒受激拉曼散射的耦合波方程理论

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摘要

We present a coupled wave semiclassical theory to describe plasmonic enhancement effects in surface-enhanced femtosecond stimulated Raman scattering (SE-FSRS). A key result is that the plasmon enhanced fields which drive the vibrational equation of motion for each normal mode results in dispersive lineshapes in the SE-FSRS spectrum. This result, which reproduces experimental lineshapes, demonstrates that plasmon-enhanced stimulated Raman methods provide unique sensitivity to a plasmonic response. Our derived SE-FSRS theory shows a plasmonic enhancement of |g(pu)|(2)Im {chi(R)(omega)g(st)(2)} / Im {chi(R)(omega)}, where |g(pu)|(2) is the absolute square of the plasmonic enhancement from the Raman pump, chi(R)(omega) is the Raman susceptibility, and gst is the plasmonic enhancement of the Stokes field in SE-FSRS. We conclude with a discussion on potential future experimental and theoretical directions for the field of plasmonically enhanced coherent Raman scattering. Published by AIP Publishing.
机译：我们提出了一种耦合波半经典理论来描述表面增强飞秒受激拉曼散射（SE-FSRS）中的等离子体增强效应。关键结果是，驱动每个正常模式的振动方程的等离子体激元增强场会导致SE-FSRS频谱中的色散线形。再现实验线形的该结果表明，等离子体激元增强的受激拉曼方法对等离子体激元响应具有独特的敏感性。我们推导的SE-FSRS理论显示| g（pu）|（2）Im {chi（R）Ωg（st）（2）} / Im {chi（R）Ω}的等离子体增强| g（pu）|（2）是来自拉曼泵的等离子体增强的绝对平方，chi（R）ω是拉曼磁化率，而gst是SE-FSRS中斯托克斯场的等离子体增强。我们以等离子体增强相干拉曼散射领域的潜在未来实验和理论方向作为讨论的结尾。由AIP Publishing发布。

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