All-optical AND, XOR, and NOT logic gates based on Y-branch photonic crystal waveguide

Haoyu Wang; Xiaoyan Yu; Xianwei Rong

doi:10.1117/1.OE.54.7.077101

13 July 2015 All-optical AND, XOR, and NOT logic gates based on Y-branch photonic crystal waveguide

Haoyu Wang, Xiaoyan Yu, Xianwei Rong

Author Affiliations +

Optical Engineering, Vol. 54, Issue 7, 077101 (July 2015). https://doi.org/10.1117/1.OE.54.7.077101

Abstract

This paper presents all-optical AND, XOR, and NOT logic gates based on the light beam interference effect. Each logic gate is simply composed of a Y-branch waveguide with two input ports and one output port in the two-dimensional triangular-lattice photonic crystals. The designed logic gates are analyzed and simulated by the plane wave expansion and finite difference time-domain method. Simulation results show that the proposed all-optical structures really function as AND, XOR, and NOT logic gates, possess a small size of less than 11.6 μm × 13.8 μm and low power consumption. The contrast ratio of the proposed devices reaches 5.4 dB for the AND gate, 33 dB for the XOR and NOT gates, respectively, by precisely controlling the phase differences and properly choosing the size of the scattering rods.

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Haoyu Wang, Xiaoyan Yu, and Xianwei Rong "All-optical AND, XOR, and NOT logic gates based on Y-branch photonic crystal waveguide," Optical Engineering 54(7), 077101 (13 July 2015). https://doi.org/10.1117/1.OE.54.7.077101

Published: 13 July 2015

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