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Optical Engineering

All-optical AND, XOR, and NOT logic gates based on Y-branch photonic crystal waveguide
Author(s): Haoyu Wang; Xiaoyan Yu; Xianwei Rong
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Paper 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.

Paper Details

Date Published: 13 July 2015
PDF: 7 pages
Opt. Eng. 54(7) 077101 doi: 10.1117/1.OE.54.7.077101
Published in: Optical Engineering Volume 54, Issue 7
Show Author Affiliations
Haoyu Wang, Harbin Normal Univ. (China)
Xiaoyan Yu, Harbin Normal Univ. (China)
Xianwei Rong, Harbin Normal Univ. (China)

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