▎ 摘　　要

NOVELTY - The optical bi-stable all-optical switch-in composite structure has several first dielectric layers, a second dielectric layer and two graphene single layers. The thickness of the first dielectric layer and the second dielectric layer is 1/4 of each optical wavelength. Two kinds of uniform dielectric thin sheet with high refractive index and low refractive index are provided in first dielectric layer and second dielectric layer, respectively. Two graphene single layers are provided at two positions of strongest local area electric field, respectively so as to realize optical bi-stable state with low threshold value. USE - Optical bi-stable all-optical switch-in composite structure based on Rudin-Shapiro photonic crystal for full optical communication. ADVANTAGE - The composite structure can realize optical bi-stable of low threshold value. The trigger threshold of the all-optical switch can be controlled by chemical potential and incident wavelength of graphene. The third-order nonlinear effect of the graphene is greatly enhanced, so as to realize low threshold optical bistable. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the optical bi-stable all-optical switch-in composite structure.