Lévesque L, Rochon P
Department of Physics, Royal Military College, Kingston, Ontario K7K 7B4, Canada.
J Opt Soc Am A Opt Image Sci Vis. 2005 Nov;22(11):2564-8. doi: 10.1364/josaa.22.002564.
Surface plasmons (SPs) are generated on a doubly corrugated gold-covered surface. The corrugations were obtained by direct holographic inscription of surface relief gratings on an azopolymer film. This method permits the superposition of multiple surface profiles with easy control of the grating spacing. One grating is inscribed to act as coupler for the incident light to the SP and a second grating is inscribed to generate a gap in the SP dispersion curve. The coupling and the gap can be observed by measuring the reflectivity of the gold surface as a function of the angle of incidence and the wavelength of the probe beam.
表面等离子体激元（SPs）在双波纹金覆盖表面上产生。这些波纹是通过在偶氮聚合物薄膜上直接全息写入表面起伏光栅获得的。这种方法允许叠加多个表面轮廓，并且易于控制光栅间距。写入一个光栅用作将入射光耦合到表面等离子体激元的耦合器，再写入第二个光栅以在表面等离子体激元色散曲线中产生一个间隙。通过测量金表面的反射率作为入射角和探测光束波长的函数，可以观察到这种耦合和间隙。
