▎ 摘　　要

NOVELTY - The device has a first dielectric layer marked as H. A second dielectrical layer is marked as L. A graphene single layer is labeled as G. The layered structure of the optical logic device is expressed as HLH1GH2HH2GH1LHL. The thickness of the thicknesses are 1/4 of each optical wavelength. The layers of H1GH 2 and H2GH 1 represent a three-layer structure formed by embedding the graphene single layers in the first layer. The first layer and the second layer are uniform dielectrics with high refractive indices and low refractive indexes. The optical logic devices of the Period-Doubling photonic crystal can realize a low threshold optical bi-stable state. The upper and lower threshold values of the lower threshold value correspond to the logic 1 and the logic 0 of the decision threshold. USE - Light logic device based on period-Doubling photonic crystal for use in full optical communication. Uses include but are not limited to storing information, transmission, relay, judging, timing, amplifying and shaping. ADVANTAGE - The optical logic device can realize low threshold optical bi-stable state, the upper and lower threshold values of the lower threshold value corresponding respectively to the logic of the optical logic devices and logic 0 of the decision threshold, and the interval between the threshold value can be flexibly adjusted by the chemical potential and incident wavelength of the graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a linear transmission spectrum of light waves in the PD photonic crystal with sequence number N = 3. Resonance wavelength lambda (1)