Title

Structural control of nonlinear optical absorption and refraction in dense metal nanoparticle arrays

Authors

Authors

D. C. Kohlgraf-Owens;P. G. Kik

Abbreviated Journal Title

Opt. Express

Keywords

FILMS; COMPOSITE; SUSCEPTIBILITIES; ENHANCEMENT; FREQUENCIES; PARTICLES; INDEX; Optics

Abstract

The linear and nonlinear optical properties of a composite containing interacting spherical silver nanoparticles embedded in a dielectric host are studied as a function of interparticle separation using three dimensional frequency domain simulations. It is shown that for a fixed amount of metal, the effective third-order nonlinear susceptibility of the composite chi((3))(omega) can be significantly enhanced with respect to the linear optical properties, due to a combination of resonant surface plasmon excitation and local field redistribution. It is shown that this geometry-dependent susceptibility enhancement can lead to an improved figure of merit for nonlinear absorption. Enhancement factors for the nonlinear susceptibility of the composite are calculated, and the complex nature of the enhancement factors is discussed. (C) 2009 Optical Society of America

Journal Title

Optics Express

Volume

17

Issue/Number

17

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

15032

Last Page

15042

WOS Identifier

WOS:000269232800058

ISSN

1094-4087

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