Third-order optical nonlinearity enhancement through composite microstructures

被引：89

作者：

Ma, HR ^{[1
]}

Xiao, RF ^{[1
]}

Sheng, P ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1998年 / 15卷 / 03期

关键词：

D O I：

10.1364/JOSAB.15.001022

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Formulas for the evaluation of third-order optical susceptibility of nonlinear composites are derived in the mean-field approximation for four different microstructures corresponding to those described by the Maxwell-Garnett theory, the Bruggeman self-consistent theory, the Sheng theory, and the differential effective medium theory. A commonly encountered error in the literature is pointed out, with the correct formulation given, Anomalous dispersion, i.e., surface plasmon resonance of coated spheres, is identified as the source of large optical nonlinear susceptibility enhancement. Examples are given that demonstrate this microstructural enhancement effect. Comparison with experimental data on AuSiO2 granular films shows that large enhancement in the third-order Kerr-type nonlinear susceptibility can indeed be realized at compositions below the percolation threshold, with prediction of even larger enhancement possible. (C) 1998 Optical Society of America.

引用

页码：1022 / 1029

页数：8

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