2004/07/25 by J. P. Huang, L. Dong, K. W. Yu
Physics and Astronomy · #cond-mat.mtrl-sci #physics.optics
paper · pdf · doi:10.1209/epl/i2004-10107-8
published as Europhys. Lett. 67, 854 (2004) · 11 pages, 2 figures. To be published in Europhysics Letters
arxiv created 2004/07/25 · arxiv updated 2009/12/01
We have derived the local electric field inside graded metal-dielectric composite films with weak nonlinearity analytically, which further yields the effective linear dielectric constant and third-order nonlinear susceptibility of the graded structures. As a result, the composition-dependent gradation can produce a broad resonant plasmon band in the optical region, resulting in a large enhancement of the optical nonlinearity and hence a large figure of merit.