A silicon waveguide-coupled gold rod embedded microring resonator

Abstract

In this paper, we propose a resonator based on the integration of a gold rod (Au) embedded microring with silicon nanowire waveguides on a silicon-on-insulator (SOI) platform. The localized surface plasmons (LSPs) inside microring are excited by the Si waveguide transmitted TE mode in the wavelength range from 1.2 to 2μm. It is demonstrated that Fano resonance is enhanced by the coherent interference of the LSPs supported by the rod and the microring. Furthermore, the resonant wavelength and intensity can be modulated by the rotation of the Au rod inside microring. Such Fano resonator shows potential in applications for integrated optical modulating, sensing, and slow-light devices.