Theory of light emission from a dipole source embedded in a chiral sculptured thin film

Tom G. Mackay, Akhlesh Lakhtakia

Research output: Contribution to journalArticle

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Abstract

Developing a theory based on a spectral Green function for light emission from a point-dipole source embedded in a chiral sculptured thin film (CSTF), we found that the intensity and polarization of the emitted light are strongly influenced by the structural handedness of the CSTF as well as the placement and orientation of the source dipole. The emission patterns across both pupils of the dipole-containing CSTF can be explained in terms of the circular Bragg phenomenon exhibited by CSTFs when illuminated by normally as well as obliquely incident plane waves. The emission characteristics augur well for the future of CSTFs as optical biosensors as well as light emitters with controlled circular polarization and bandwidth.

Original languageEnglish (US)
Pages (from-to)14689-14703
Number of pages15
JournalOptics Express
Volume15
Issue number22
DOIs
Publication statusPublished - Oct 29 2007

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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