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Realization of semi-integer mode plasmonic filters using sector-defected disk resonator

G. WAMG1, Q. SHI1, P. JI1, F. CHEN1,*


  1. School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, 434023, China


A semi-integer mode plasmonic filter via a metal-insulator-metal (MIM) waveguide system is presented in this paper, the waveguide structure is composed of a nanodisk resonator with sector defect. Finite difference-time domain method (FDTD) is used to study the structure’s transmission characteristics and magnetic field distributions. It is observed that the semi-integer mode can be excited in the sector-defected disk resonator. The positions and intensities of plasmonic resonant modes can be tuned by the angle of the sector defect, coupling distance, the refractive index of the nanodisk. The calculated maximum quality factors are 237.5, 381, and 286.5 respectively. Compared to the other related structure, the quality factor of the present sector-defected disk resonator structure is relatively excellent. The proposed plasmonic filter provides a basis for designing high quality factor filter and optical integrated circuits..


Surface plasmon polariton, Metal-insulator-metal, Sector defect, Plasmonic filter, Optical integrated circuits.

Submitted at: Nov. 15, 2021
Accepted at: Aug. 10, 2022


G. WAMG, Q. SHI, P. JI, F. CHEN, Realization of semi-integer mode plasmonic filters using sector-defected disk resonator, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 7-8, pp. 295-303 (2022)