Performance Analysis of All-Optical NOT Logic Gate Based on 2-D Nonlinear Photonic Crystal

Léo César P. de Almeida, Marcos B. C. Costa

DOI: 10.14209/sbrt.2016.140

Evento: XXXIV Simpósio Brasileiro de Telecomunicações (SBrT2016)

Keywords: All-Optical NOT Logic Gate Photonic Crystal Ring Resonator Finite Difference Time Domain Contrast Ratio Quality Factor.

Abstract

In this paper, a novel scheme for implementation of all-optical NOT logic gate based on two dimension (2-D) photonic crystal (PhC) ring resonator has been proposed, designed and simulated. The new all-optical switch is composed of a nonlinear Photonic Crystal Ring Resonator (PCRR). The PhC structure has a square lattice of silicon rods in air substrate. The Plane Wave Expansion (PWE) and Finite Difference Time Domain (FDTD) methods are used to analyze the behavior of the structure. The PWE method is used to calculate the photonic band gap of the PhC structure, which is from 0.2654 to 0.3897 (a/λ). The square lattice of gate NOT fabricated is implemented on the opera-tional wavelength of the input ports is 1700 nm using finite difference on an air wafer of only 12 μm x 12 μm. The simulation results using two-dimensional FDTD method show that the proposed PhC all-optical NOT logic gate presented here is a potential candidature for ultrafast optical digital circuits and highly advantageous with high transmitting power and simple design.

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