All-optical logic gates based on two-dimensional low-refractive-index nonlinear photonic crystal slabs

ArticleinOptics Express 19(3):1945-53 · January 2011with34 Reads
Impact Factor: 3.49 · DOI: 10.1364/OE.19.001945 · Source: PubMed


    This article demonstrates theoretical design of ultracompact all-optical AND, NAND, OR, and NOR gates with two-dimensional nonlinear photonic crystal slabs. Compound Ag-polymer film with a low refractive index and large third-order nonlinearity is adopted as our nonlinear material and photonic crystal cavities with a relatively high quality factor of about 2000 is designed on this polymer slab. Numerical simulations show that all-optical logic gates with low pump-power in the order of tens of MW/cm2 can be achieved. These design results may provide very useful schemes and approaches for the realization of all-optical logic gates with low-cost, low-pump-power, high-contrast and ultrafast response-time.