All optical nor gates implemented by 2-D photonic crystals

In this paper, a novel all-optical NOR logic gate based on 2-D PC is demonstrated. This gate is consisted with two optical T-type switches. The T-type switch adopts a T-type waveguide in Γ-X direction with a nonlinear PCRR, which can be achieve a fast switching time of about 3 ns. Moreover, the structure of proposed NOR gate has small size of about 18 μm × 11 μm and can work with low power consumption in comparison with the conventional PC-based optical gate. Therefore, the proposed optical NOR logic gate is very useful to apply on ultrafast optical logic operations and future optical computing components.