▎ 摘　　要

NOVELTY - The device has several first dielectric layers (A) and second dielectric layers (B) and four graphene single layers (G). The multi-layer structure of all-optical digital encoder is expressed as ABABBBABABB1GB2BB3GB4BB4GB3BB2GB1BABABBBABA, and B1GB2, B2GB1, B3GB4 and B4GB3 represents a sandwich structure formed by a single layer of graphene embedded in second dielectric layer. The two dielectric layers are two uniform dielectric sheets with different refractive indexes. The optical logic device has four optical sub-forms. The electric field corresponding to sub-shape has a local effect. The four graphene monolayers are embedded in strongest local electric field corresponding to sub-shapes. The third-order nonlinear effect of monolayer is enhanced, and realize low-threshold optical bistability. The optical bistable state is applied to a logic device with adjustable trigger threshold. The thickness of two dielectric layers are each 1/4 of respective optical wavelength. USE - Graphene-based trigger threshold dimmable logic device used in optical communication. ADVANTAGE - The device reduces the threshold value of the optical double-stable state, and realizes flexible and adjustable threshold, so that it is applied to the optical logic device. The third-order nonlinear effect of the graphene single layer is enhanced, so as to realize low threshold optical bi-stable threshold value. The thicknesses of the dielectric thin sheets are 1/4 of their respective optical wavelengths, and thus, the optical bistable in the structure is adjusted flexibly by the chemical potential and incident wavelength of graphene. The interval between the trigger threshold of the logic 0 is reduced, and the interval between upper and lower threshold value is reduced with the reduction of the incident wavelength and chemical potential. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the composite structure of Cantor photonic crystal and graphene with serial number in graphene-based trigger threshold dimmable logic device. Optical logic (0) First dielectric layers (A) Second dielectric layers (B) Graphene single layers (G) Incident light (I1) Emergent light (I2)