Optical nonlinearity enhancement of graded metal-dielectric composite films

Details Optical nonlinearity enhancement of graded metal-dielectric composite films Optical nonlinearity enhancement of graded metal-dielectric composite films

2004-07-25

arxiv.org/abs/cond-mat/0407649v1

Europhys. Lett. 67, 854 (2004)

Physics

Condensed Matter

Materials Science

11 pages, 2 figures. To be published in Europhysics Letters

Scientific paper

10.1209/epl/i2004-10107-8

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.

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