On chemiluminescent emission from an infiltrated chiral sculptured thin film

Siti S. Jamaian, Tom G. Mackay

Research output: Contribution to journalArticlepeer-review

Abstract

The theory describing the far-field emission from a dipole source embedded inside a chiral sculptured thin film (CSTF), based on a spectral Green function formalism, was further developed to allow for infiltration of the void regions of the CSTF by a fluid. In doing so, the extended Bruggeman homogenization formalism - which accommodates constituent particles that are small compared to wavelength but not vanishingly small - was used to estimate the relative permittivity parameters of the infiltrated CSTF. For a numerical example, we found that left circularly polarized (LCP) light was preferentially emitted through one face of the CSTF while right circularly polarized (RCP) light was preferentially emitted through the opposite face, at wavelengths within the Bragg regime. The centre wavelength for the preferential emission of LCP/RCP light was red shifted as the refractive index of the infiltrating fluid increased from unity, and this red shift was accentuated when the size of the constituent particles in our homogenization model was increased. Also, the bandwidth of the preferential LCP/RCP emission regime decreased as the refractive index of the infiltrating fluid increased from unity. (C) 2011 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)2382-2392
Number of pages11
JournalOptics Communications
Volume284
Issue number9
DOIs
Publication statusPublished - 1 May 2011

Keywords

  • Inverse Bruggeman homogenization formalism
  • Spectral Green function
  • Dipole radiation
  • EXTENDED MAXWELL-GARNETT
  • MODEL
  • DNA
  • HYBRIDIZATION
  • ENHANCEMENT
  • COMPOSITES
  • MEDIA
  • WAVES
  • ANGLE

Fingerprint

Dive into the research topics of 'On chemiluminescent emission from an infiltrated chiral sculptured thin film'. Together they form a unique fingerprint.

Cite this