Abstract

A dual-band optical filter based on a single microring resonator embedded with nanoholes is theoretically and experimentally demonstrated for the first time. A numerical model based on transfer matrix method is utilized to simulate the performance of this device. The coupling between the microring resonator and the Fabry–Pérot resonator formed by nanoholes gives rise to the dual-band optical filtering spectrum. In our experiment, a single microring resonator embedded with nanoholes was fabricated on a commercial 220-nm-thick-top-silicon silicon-on-insulator (SOI) platform. Good performance was achieved with measured extinction ratio of 9 dB, insertion loss of lower than 1 dB, and quality factor of 11900. Both experimental and simulation results are in good agreement.

© 2017 Optical Society of America