| Summary: | 碩士 === 國立臺灣大學 === 應用物理所 === 99 === Surface plasmon polaritons (SPP) are electromagnetic eigen-excitations coupled with charge oscillations at the metal-dielectric surface, which has been applied in optical imaging, bio- and chemical- sensors, enhanced Raman and nonlinear optics effect, etc by favor of its sub-wavelength and local field enhancement effects. People have studied surface plasmon modes in single metallic nanostructure, including sphere, ellipsoid, cylinder, etc. Now the coupling effects between nanostructures become a new hot topic since they will give rise to fascinating properties. Here we will focus on the dispersion of propagating surface plasmon modes in periodic metallic nanostructures. Our approach is the eigenmode analysis based upon the finite element method (FEM), and can be applied to 2D/3D dispersive, anisotropic, and arbitrary shaped nanostructures.
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