Title :
A Simple Nanometeric Plasmonic Narrow-Band Filter Structure Based on Metal–Insulator–Metal Waveguide
Author :
Zhu, Jia Hu ; Wang, Qi Jie ; Shum, Ping ; Huang, Xu Guang
Author_Institution :
Key Lab. of Photonic Inf. Technol., South China Normal Univ., Guangzhou, China
Abstract :
In this paper, a novel nanometeric plasmonic narrow-band filter consisting of a metal-insulator-metal waveguide and a cavity embedded in the metal is proposed and numerically demonstrated by using the finite difference time domain method. The physical mechanism of the filter is elucidated. The results reveal that a narrow-band spectrum notch-filtering function can be realized with the proposed structure. The selection wavelength of the notch is proportional to the length of the cavity and inversely quasi-proportional to its width. The simple plasmonic filter structure has an ultracompact size with a length of a few hundred nanometers. Our results may open a way to construct nanoscale high-density photonic integration circuits based on plasmonic effects.
Keywords :
MIM structures; finite difference time-domain analysis; integrated optics; nanophotonics; notch filters; optical waveguide filters; plasmonics; surface plasmons; embedded cavity; finite difference time domain method; metal-insulator-metal waveguide; nanometric plasmonic narrow-band filter; narrow-band spectrum; notch-filtering function; photonic integration circuits; plasmonic effects; selection wavelength; simple plasmonic filter structure; ultracompact size; Cavity resonators; Metals; Optical filters; Optical surface waves; Optical waveguides; Plasmons; Resonator filters; Integrated optics devices; metal–insulator–metal waveguide; surface plasmons; wavelength filtering;
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2011.2147330
