We propose a prism structure to couple out the surface plasmon wave generated by Kretschmann device, transfer the absorption peak to transmission peak, and efficiency of near 70% is obtained.

• 表面等离子波是指在金属和介质表面传播的电磁波,在垂直界面方向上呈指数衰减,本文提出了一种棱镜结构用以耦合出由Kretschmann结构产生的表面等离子波,使反射、吸收能量转化为透射光。