Simple expressions for Bragg reflection from axially excited chiral sculptured thin films

Akhlesh Lakhtakia, Martin McCall

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Reported here is the derivation of analytic expressions for the reflection coefficients of a halfspace filled by a chiral sculptured thin film (STF) that is axially excited by a normally incident plane wave at the centre-wavelength of the Bragg regime. Although these expressions are correct to the second order with respect to a small parameter that delineates the local anisotropy of the chiral STF, their first-order reductions are particularly simple and very adequate for practical purposes. A small difference between the two cross-polarized reflection coefficients has also been found. The results are explained on the basis of a simple model which utilizes the standard Fresnel equations for a scalar dielectric halfspace, combined with coupled wave theory.

Original languageEnglish (US)
Pages (from-to)1525-1535
Number of pages11
JournalJournal of Modern Optics
Volume49
Issue number9
DOIs
StatePublished - Jul 20 2002

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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