Title :
Spectral Characteristics of Plasmonic Metal–Insulator–Metal Waveguides With a Tilted Groove
Author :
Kun-Hua Wen ; Lian-Shan Yan ; Wei Pan ; Bin Luo ; Zhen Guo ; Ying-Hui Guo ; Xian-Gang Luo
Author_Institution :
Center for Inf. Photonics & Commun., Southwest Jiaotong Univ., Chengdu, China
Abstract :
Spectral characteristics of surface plasmon polaritons (SPPs) in metal-insulator-metal (MIM) waveguides with a rectangular or V-groove are analyzed. Theoretical and simulation results indicate that both schemes can achieve wavelength filtering functionality with the center wavelength possessing a linear relationship with the length of the groove. The plasmonic MIM waveguide with a tilted groove could be regarded as the composition of a hypotenuse, rectangular, and V-shaped structures based on theoretical analyses. Characteristics of such waveguides are further investigated numerically by the finite-different time-domain (FDTD) method. The center wavelength of such structure has a nonlinear relationship with the height of the groove. The unique feature may help researchers design grooves with specified angles in nanophotonic integrated circuits.
Keywords :
MIM devices; finite difference time-domain analysis; optical design techniques; optical filters; optical waveguides; plasmonics; polaritons; surface plasmons; FDTD method; SPP; V-groove; V-shaped structures; center wavelength possessing; finite-different time-domain method; groove design; hypotenuse structures; linear relationship; nanophotonic integrated circuits; nonlinear relationship; plasmonic MIM waveguide; plasmonic metal-insulator-metal waveguides; rectangular structures; spectral characteristics; surface plasmon polaritons; tilted groove; wavelength filtering; Finite difference methods; Optical waveguides; Plasmons; Rectangular waveguides; Simulation; Surface waves; Time domain analysis; Surface plasmon polaritons (SPPs); tilted groove; transmission; waveguide;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2216863
