All-optical Half-adder based on multilayer structure with second-order nonlinearity effects

This paper investigates the effect of linear and non-linear refractive indices on the performance of a multilayer structure based on second-order non-linear effects. Decreasing the non-linear refractive index and increasing the linear refractive index division make the transmitted signal closer to unity and also reduce the length of the structure. An all-optical logic gates is proposed using introduced logic gates and the operation is discussed in details. This basic unit due to high performance and low attenuation in operational frequency and simplicity of implementation could be an ideal choice in future optical logic systems.