Effective optical properties of non-absorbing nanoporous thin films

被引：183

作者：

Braun, MM ^{[1
]}

Pilon, L ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Henri Samueli Sch Engn & Appl Sci, Dept Aerosp Engn & Mech, Los Angeles, CA 90095 USA

来源：

THIN SOLID FILMS | 2006年 / 496卷 / 02期

基金：

美国国家科学基金会;

关键词：

dielectric constant; nanostructure; optical properties; optoelectronic devices;

D O I：

10.1016/j.tsf.2005.08.173

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Numerous effective medium models have been proposed for the effective optical properties of nanoporous media. However, validations of these models against experimental data are often contradictory and inconclusive. This issue Was numerically investigated by solving the two-dimensional Maxwell's equations in non-absorbing nanoporous thin films with various morphologies. It was found that below a certain critical film thickness, the effective index of refraction depends on the porosity and oil the pore size, shape and spatial distribution. For thick enough films the effective index of refraction depends solely on porosity and on the indices of refraction of the two constitutive phases. The numerical results agree very well with a recent model obtained by applying the Volume Averaging Theory to the Maxwell's equations. However, commonly used models systematically and sometimes significantly underpredict the numerical results. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：505 / 514

页数：10

共 48 条

[1] Self-aligned porous silicon optical waveguides [J].