Optical response of a nonlinear composite film

摘要

We study transmission through a composite thin film of coated spherical particles with a metallic core and a nonlinear dielectric shell. Near the surface-plasmon resonance, the optical nonlinearity can be enormously enhanced. We demonstrate that a several order of magnitude reduction in the threshold intensity dan be achieved by tuning the microstructure parameters of the composite. (C) 1997 Optical Society of America.