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测量了棱镜／ＬＢ膜／银膜／空气、棱镜／银膜／银膜／空气、棱镜／银膜／空气三种结构在衰减全反射条件下激发的表面等离子激元波由于银膜－空气界面粗糙度而散射到空气中的辐射效率。同时，由散射光强分布计算出表面粗糙度参数即横向相关长度σ和表面波纹深度δ，再由σ和δ计算出理论辐射效率，理论与实验结果相符合。
The surface plasmon waves excited by the three kinds of structures of prism / LB film / silver film / air, prism / silver film / silver film / air and prism / silver film / air were measured under attenuated total reflection Roughness and scattering into the air radiation efficiency. At the same time, the surface roughness parameters, ie, the transverse correlation length σ and the surface corrugation depth δ, are calculated from the scattered light intensity distributions, and the theoretical radiation efficiency is calculated from σ and δ. The theoretical and experimental results are in good agreement.