On-chip all-optical switch based on optical bistable effect and design method

The invention provides an on-chip all-optical switch based on an optical bistable effect and a design method, the on-chip all-optical switch comprises a micro-cavity model and an incident light model coupled with the micro-cavity model, the inner layer materials of the micro-cavity model and the incident light model are optical nonlinear materials, and the outer layers are wrapped by metal; the coupling gap width g of the microcavity model and the incident light model is determined by the skin depth of the outer-layer metal; an Esource port of the incident light model is provided with a continuous wave source, and when the amplitude intensity of the continuous wave source is changed from small to large and from large to small along with time, normalized transmission coefficient curves at the Eout port of the incident light model do not coincide. Based on the technical scheme, the rate of the optical switch reaches 1.72 ps, the extinction rate reaches 87%, the effect of logic '0' and '1' can be achieved by set