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 can be achieved by tuning the microstructure parameters of the composite.
© 1997 Optical Society of America
K. P. Yuen and K. W. Yu, "Optical response of a nonlinear composite film," J. Opt. Soc. Am. B 14, 1387-1389 (1997)