Nanofocusing in a metal - insulator - metal gap plasmon waveguide with a 3 - dimensional linear
نویسنده
چکیده
An Au-SiO2-Au (metal-insulator-metal; MIM) surface-plasmon-polariton (SPP) guide is schematically presented in Fig. S1a. As the name “MIM” implies, a structural symmetry exists with respect to the mirror plane that cuts through the center of the SiO2 layer and is parallel to the x–y plane. As a result, supported SPP modes in the guide can be classified into two major types, each with its own distinctive eigenstates [1–5]. One is symmetric (S), and the other is antisymmetric (AS). In a symmetric mode, the electric-field distribution is symmetric around the mirror plane, while in an anti-symmetric mode, the distribution is anti-symmetric, as shown in Fig. S2.
منابع مشابه
Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper
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