Title :
Optical Absorption in Graphene-on-Silicon Nitride Microring Resonators
Author :
Jiaqi Wang ; Zhenzhou Cheng ; Shu, Chester ; Hon Ki Tsang
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Abstract :
Graphene-on-silcon nitride (Si3N4) microring resonators were theoretically optimized and experimentally demonstrated to enhance their absorption. The original absorption of 25 dB/mm in a graphene-on-Si3N4 straight waveguide was significantly enhanced through the resonator structure, offering a quality factor from ~28200 to ~3800 depending on the graphene length in the cavity. The result agrees well with theoretical calculations. The characterization study in this letter is useful in developing graphene-on-Si3N4 microring resonator structure for high-performance optical modulators and photodetectors.
Keywords :
Q-factor; graphene; integrated optics; micro-optics; microcavities; nanophotonics; optical resonators; optical waveguides; optimisation; silicon compounds; C-Si3N4; absorption; graphene-on-silicon nitride microring resonators; high-performance optical modulators; optical absorption; optical cavity; optimization; photodetectors; quality factor; straight waveguide; Absorption; Graphene; Optical device fabrication; Optical resonators; Optical waveguides; Photodetectors; Photonics; Graphene; integrated photonics; microring resonator; photodetector; silicon nitride;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2443051
