Abstract
In this paper an add/drop filter based on a two dimensional (2D) photonic crystal ring resonator (PCRR) is proposed and its performance is studied. This device is comprised of a hexagonal PCRR between two parallel waveguides formed by creating line defects in a 2D lattice structure with an array of 20 × 20 Si (Silicon) rods in air host. The lattice constant a is 636 nm and the radius of silicon (Si) rods r is 0.2a. The size of the add/drop filter is 6 μm × 6 μm. We have achieved nearer to 100% dropping efficiency when the wavelength (λ) of the optical input signal is 1.55 μm. Optical signal can be made to drop at a different port by varying its wavelength or radius of Si rods. Simulation of the device is performed using a licensed RSoft FullWAVE tool based on a finite difference time domain (FDTD) simulator. The proposed structure could be used as an add/drop filter in the wavelength division multiplexing.
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Acknowledgments
This work is supported by Vision Group on Science and Technology, Bangalore, Karnataka State, India under Award No. VGST/K-FIST (L1) (2014-15)/2015-16/373.
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Soma, S., Sonth, M.V. & Gowre, S.C. Tunable Optical Add/Drop Filter for CWDM Systems Using Photonic Crystal Ring Resonator. J. Electron. Mater. 48, 7460–7464 (2019). https://doi.org/10.1007/s11664-019-07572-1
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DOI: https://doi.org/10.1007/s11664-019-07572-1