Pushpendra Meena, Rukhsar Zafar, Rahul Pandey, Kamal Kishore Choure, N. Mudgal, G. Singh
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Photonic Crystal based All Optical OR and XOR Gate with high Contrast Ratio and Noise Margin
In this paper, Photonic crystal based all optical XOR and OR gate is proposed. 2D hexagonal lattice of Photonic crystal is being used. The defects are introduced for the designing of efficient gates. The photonic band gap is optimized with the proper selection of r/a ratio i.e. ratio of radius of cell and lattice constant. The structure is investigated through Plane wave expansion (PWE) method and Finite Difference time domain (FDTD). The band-gap of perfect crystal lies in C band. The performance of gates is analyzed through contrast ratio and Noise margin. The Contrast ratio for XOR gate is as high as 15.37 dB and Noise Margin is 0.68 and 0.655 for OR and XOR gate respectively.
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