Novel all-optical logic gates based on photonic crystal structure

Abstract

We have designed AND, NOT, and NOR logic gates based on photonic crystal structure employing cross-waveguide geometry with nonlinear rods using finite difference time domain (FDTD) method. The logical function is based on the frequency resonance shift of the microcavity caused by Kerr nonlinearity. The proposed devices benefit a simple and small structure, and clear operating principle.