We study the effective third-order nonlinear susceptibility of a graded metal–dielectric composite film of anisotropic particles with weak nonlinearity by invoking the local field effects within the Maxwell–Garnett theory. We further numerically demonstrate that the film can serve as a novel optical material to produce a broad structure in both the linear and the nonlinear response and an enhancement in the nonlinear response.
© 2005 Optical Society of America
Ji Ping Huang and Kin Wah Yu, "Effective nonlinear optical properties of graded metal-dielectric composite films of anisotropic particles," J. Opt. Soc. Am. B 22, 1640-1647 (2005)