Response of slanted chiral sculptured thin films to dipolar sources

被引：14

作者：

Wang, F ^{[1
]}

Lakhtakia, A ^{[1
]}

机构：

[1] Penn State Univ, Dept Engn Sci & Mech, Computat & Theoret Mat Sci Grp, CATMAS, University Pk, PA 16802 USA

来源：

OPTICS COMMUNICATIONS | 2004年 / 235卷 / 1-3期

关键词：

nanomaterials; sculptured thin film; structural handedness; point dipoles; Beltrami sources; Green functions;

D O I：

10.1016/j.optcom.2004.03.016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A theoretical investigation of the electromagnetic response of a slanted chiral sculptured thin film (STF) to dipolar sources is presented. Dyadic Green functions (DGFs) for a slanted chiral STF sandwiched between two vacuous half-spaces are formulated as planewave angular spectrums. First, the response of the slanted chiral STF to obliquely incident plane waves is obtained by rigorous coupled-wave analysis implemented with a stable algorithm, then, asymptotic evaluation of the DGFs is carried in the far-field limit. The radiation patterns of Beltrami source configurations close to a slanted chiral STF are computed and discussed. In particular, certain characteristic features - which are closely related to the circular Bragg phenomenon - in the radiation patterns are found to be spatially asymmetric, because of the effective transverse periodicity of the chosen thin film. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：133 / 151

页数：19

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