Open AccessPlasmonic filters and optical directional couplers based on wide metal-insulator-metal structure
Author(s) -
Pixin Chen,
Renrong Liang,
Qiaodong Huang,
Zhe Yu,
Xingyuan Xu
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.007633
Subject(s) - power dividers and directional couplers , finite difference time domain method , plasmon , materials science , metal insulator metal , optics , fabrication , insulator (electricity) , dielectric , optoelectronics , optical filter , surface plasmon , nanoscopic scale , surface plasmon polariton , nanotechnology , physics , voltage , medicine , alternative medicine , pathology , quantum mechanics , capacitor
The wide Metal-Insulator-Metal (WMIM) structure is proposed and its characteristics are analyzed numerically using finite-difference time-domain (FDTD) method. Simulations show that power can be periodically transferred between its two Metal-Insulator (MI) interfaces while power is injected asymmetrically. Novel plasmonic filters and optical directional couplers (ODCs) based on WMIM structure are proposed, which work similarly as traditional dielectric devices. Due to the simple structures without thin metal gaps, our result may provide an alternative way to realize the fabrication of nanoscale optical devices.