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In this paper, we aim to design an all-optical structure that can be employed as optical OR/AND logic gates. To do so, a nonlinear photonic crystal-based ring resonator will be designed whose resonant wavelength depends on the variation of optical intensity. Then, by adding some optical waveguides, the optical logic circuit structure will be obtained that can function as optical OR/AND logic gates. The maximum time delay for the proposed structure is about 1.5 ps. Total footprint of the proposed structure is about 372 mm 2 . The proposed structure has lower time delay, lower footprint and lower optical input power compared with previously proposed structures.

A Novel Proposal for All-Optical OR/AND Gate Using Nonlinear Photonic Crystal Ring Resonators