Kats Mikhail A, Woolf David, Blanchard Romain, Yu Nanfang, Capasso Federico
School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138, USA.
Opt Express. 2011 Aug 1;19(16):14860-70. doi: 10.1364/OE.19.014860.
We describe the properties of guided modes in metallic parallel plate structures with subwavelength corrugation on the surfaces of both conductors, which we refer to as spoof-insulator-spoof (SIS) waveguides, in close analogy to metal-insulator-metal (MIM) waveguides in plasmonics. A dispersion relation for SIS waveguides is derived, and the modes are shown to arise from the coupling of conventional waveguide modes with the localized modes of the grooves in the SIS structure. SIS waveguides have numerous design parameters and can be engineered to guide modes with very low group velocities and adiabatically convert light between conventional photonic modes and plasmonic ones.
我们描述了在两个导体表面均具有亚波长波纹的金属平行板结构中导模的特性，我们将其称为仿绝缘-仿绝缘（SIS）波导，这与等离子体学中的金属-绝缘体-金属（MIM）波导极为相似。推导了SIS波导的色散关系，并表明这些模式源于传统波导模式与SIS结构中凹槽的局域模式的耦合。SIS波导具有众多设计参数，并且可以通过设计来引导具有极低群速度的模式，并在传统光子模式和等离子体模式之间实现光的绝热转换。
