Study of Surface Plasmon Excitation of Pulley-Type Metallic Microring Structure
Ya-Cyun Yin1*, Chii-Chang Chen1
1Department of Optics and Photonics, National Central University, Zhongli District, Taoyuan City, Taiwan
* presenting author:Ya-Cyun Yin,
In this paper, we study the condition to excite the surface plasmon in the pulley-type metallic microring structure. A method based on Helmholtz equation is applied to determine the equivalent incidence angle of the curved waveguide with different-order of the TM modes by the conformal transformation method. The surface plasmon excitation angle is confirmed by the finite-element method (Comsol Multiphysics). The pulley-type metallic microring structure is analyzed by the finite-element method for different structures to obtain stronger surface plasmon excitation.

Keywords: surface plasmon, conformal transformation method, finite-element method, curved waveguide, microring