The New Design and Simulation of an Optical Add Drop Filter Based On Hexagonal Photonic Crystal Single Ring Race Track Resonator



In this paper, using annular resonator we have designed an adding and dropping filter light based on
two-dimensional photonic crystals. The shape of ring resonator filter adding and dropping that we
have proposed is Race Track. This filter has a hexagonal lattice structure of silicon bars with
refractive index 3/46 that is located in the context of air with refractive index 1. Transmission
efficiency and quality coefficient of our proposed filter are respectively 94% and 310. Finite difference
method in two-dimensional time domain (2-D FDTD) used for normalized transmission spectra of
photonic crystal ring resonator and to calculate the photonic band, plane wave expansion method
(PWE) has been used.