表面极化声子的喇曼散射研究

本文主要研究表面极化声子的喇曼散射.在探测表面极化声子的衰减全反射方法以及喇曼散射方法的基础上,借鉴了Kretchmann配置的衰减全反射喇曼散射法,提出了Otto配置的衰减全反射喇曼散射法,并以CaF_2单晶体为样品做了一系列实验.同时,本文利用了能量守恒及平行于样品表面的能量守恒关系,利用了格林函数或响应函数所推出的表面极化声子的一般频散关系,理论上给出了CaF_2-空气表面极化声子的一个唯象的频散关系.实验上用特定设计制做的一个样品架对CaF_2样品测定了它与空气界面上的表面极化声子的频散关系,比较结果,理论与实验取得了比较令人满意的一致.

Raman scattering by surface photon-polaritions

In this paper, we present the study of Raman Scattering by Surface Polaritons (SPs). Based on the Attenuated Total Reflection method (ATR method) and Raman Scattering method and refered to the method of Raman Scattering under ATRf conditions (RSATR) in Kretchmann configuration, we have suggested a method o RSATR with Otto configuration and have made a series of experiments on the sample of single crystal CaF2. Theoretically we have got a phenomenologioal dispersion relation of SPs on the boundary between OaF2 and air using the law of energy conservation and the law of momentum conservation parallel to the sample surface as well as general dispersion relation of SPs derived from surface Green function or surface response function. With the help of sample carrier specially designed, the experiment was carried out to measurle the dispersion relation of SPs. Comparison indioates that the experimental results are in good agreement with that of theory.