New Design of Optical Add-Drop Filter Based on Triangular Lattice Photonic Crystal Ring Resonator
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2013, Vol 4, Issue 4
Abstract
In this paper, a new design of add-drop filter based on two-dimensional photonic crystal ring resonator is proposed. The structure is made of a triangular lattice of silicon rods with the refractive index n1=3.4641 which are perforated in air with refractive index n2=1. Resonant modes of the all ring resonator and their corresponding degenerated poles are calculated using the Plane Wave Expansion (PWE) method and the filter’s transmission spectrum is calculated using two-dimensional Finite Difference Time Domain (2D-FDTD) numerical method. Full Width Half Maximum (FWHM) bandwidth of the filter at the output transmission spectrum - from 1.507~1.511m - is 4nm.The dropping efficiency and quality factor of channel drop filter are 100% and 502.66, respectively. The proposed structure is small and the overall dimension is 10m×18.5m which is suitable for photonic integrated circuits.
Authors and Affiliations
Zohreh Rashki*| Faculty of Electrical and Computer Engineering, University of Sistan and Baluchestan, P. O. Box 98164-161, Zahedan, Iran.zohreh_r81@yahoo.com, Mohammad Ali Mansouri-Birjandi| Faculty of Electrical and Computer Engineering, University of Sistan and Baluchestan, P. O. Box 98164-161, Zahedan, Iran., Mohammad Reza Rakhshani| Faculty of Electrical and Computer Engineering, University of Sistan and Baluchestan, P. O. Box 98164-161, Zahedan, Iran.
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