Abstract

The propagation characteristics of excited surface plasmon polaritons in a plasmonic filter are studied by controlling the geometric parameters of the waveguide. The proposed filter is composed of two nanoscale metal-insulator-metal type surface plasmon polariton based bus waveguides connected through two face-to-face concentric semi-rings with different radii placed at the top and bottom. Numerical results show that the wavelengths of the transmission spectra dips have changes of red shift when either the radius of the two semi-rings or the refractive index of the insulator is increased. This sensitivity is superior to the filter properties, and thus we believe that the proposed waveguide structure has potential application in nanoscale photonic devices integration.

© 2017 Optical Society of America

The transmission characteristics of surface plasmon polaritons in ring resonator

Tong-Biao Wang, Xie-Wen Wen, Cheng-Ping Yin, and He-Zhou Wang
Opt. Express 17(26) 24096-24101 (2009)

Plasmon filters and resonators in metal-insulator-metal waveguides

P. Neutens, L. Lagae, G. Borghs, and P. Van Dorpe
Opt. Express 20(4) 3408-3423 (2012)

Significantly increased surface plasmon polariton mode excitation using a multilayer insulation structure in a metal–insulator–metal plasmonic waveguide

Hongyan Yang, Jianqing Li, and Gongli Xiao
Appl. Opt. 53(17) 3642-3646 (2014)

Plasmonic wavelength demultiplexer with a ring resonator using high-order resonant modes

Chia-Ti Wu, Chia-Chih Huang, and Yeun-Chung Lee
Appl. Opt. 56(14) 4039-4044 (2017)

Plasmonic filters and optical directional couplers based on wide metal-insulator-metal structure

Pixin Chen, Ruisheng Liang, Qiaodong Huang, Zhe Yu, and Xingkai Xu
Opt. Express 19(8) 7633-7639 (2011)