Year: 2010
Type: article
Abstract: In this numerical study, we present a tunable photonic crystal optical filter design composed of anisotropic material. Various tunable optical filters which are composed of point and line defects in a square lattice of dielectric rods, with selective infiltration of some of the rods with anisotropic material, are presented. Our numerical simulations with the finite-difference time-domain (FDTD) technique reveal that defect states originating from the anisotropic material impurities can be effectively tuned. The tunable range of 20 nm of the optical channel is obtained. Moreover, we suggest a new tunable two-port channel-drop photonic crystal filter based on a Y-splitter and show that, by tuning the characteristics of this structure, total transmission up to 94% and 84% in each output port is achievable. Also, we come to the fact that our proposed structure, compared to conventional photonic crystal channel-drop filters, has the advantages in miniaturizing wavelength-selective filters for WDM systems.
Source: Journal of Optics
Institution: K. N. Toosi University of Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1990979779