Response of slanted chiral sculptured thin films to dipolar sources

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)133-151
Number of pages19
JournalOptics Communications
Volume235
Issue number1-3
DOIs
StatePublished - May 1 2004

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Thin films
thin films
dyadics
Green's function
Green's functions
radiation
half spaces
far fields
periodic variations
plane waves
electromagnetism
evaluation
configurations

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "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.",
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Response of slanted chiral sculptured thin films to dipolar sources. / Wang, Fei; Lakhtakia, Akhlesh.

In: Optics Communications, Vol. 235, No. 1-3, 01.05.2004, p. 133-151.

Research output: Contribution to journalArticle

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AU - Lakhtakia, Akhlesh

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N2 - 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.

AB - 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.

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