Translator Disclaimer
10 February 2021 Multi-Fano resonances in MIM waveguides coupled with split annular cavity connected with rectangular resonator and application for multichannel refractive index sensor
Author Affiliations +
Abstract

A plasmonic structure, constituted by metal insulator metal waveguides and split annular cavity connected with rectangular resonator (SACRR), is proposed and investigated. Numerical simulation by the finite element method (FEM) has been done to investigate the transmittance properties of the proposed structure and four Fano resonances arise in the results. To analyze and verify the simulation results, multimode interference coupled mode theory is engaged, theoretically. In addition, the structural parameters are analyzed and discussed to design and control the proposed structure, which shows sufficient flexibility. Due to multi-Fano resonances providing multiple monitoring points and the extremely sharp asymmetry of Fano resonance, the structure can service as a high-performance multichannel refractive index nanosensor with a sensitivity of 1000 nm/RIU and maximum figure of merit of 1.358  ×  105. The designed structure can surely meet extensive applications for nanoscale devices and integrated optical devices.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 1934-2608/2021/$28.00 © 2021 SPIE
Shilin Yu, Yu Su, Zhuoyue Sun, Tonggang Zhao, and Jianguo Yu "Multi-Fano resonances in MIM waveguides coupled with split annular cavity connected with rectangular resonator and application for multichannel refractive index sensor," Journal of Nanophotonics 15(1), 016004 (10 February 2021). https://doi.org/10.1117/1.JNP.15.016004
Received: 17 November 2020; Accepted: 19 January 2021; Published: 10 February 2021
JOURNAL ARTICLE
10 PAGES


SHARE
Advertisement
Advertisement
Back to Top