Abstract:

Abstract An all optical logic gate which plays an important role in high speed switching networks. In this paper aim to construct and analyze the two-dimensional photonic crystal all optical AND gate. A logic gate is the basic building blocks of any digital system. The reported all optical AND gate is composed of two input waveguide and one output waveguide with line and point defect using a hexagonal lattice. The functional parameters such as contrast ratio, bit rate, transmission efficiency and response time are calculated. The performance of the AND gate is analyzed by using Finite Difference Time Domain method. The proposed logic gate is designed to operate at a wavelength of 1550nm. It offers high contrast ratio and minimum delay time. Hence it is suitable for photonic computational integrated circuits.

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