Ambichiral, equichiral and finely chiral layered structures

Ian J. Hodgkinson, Akhlesh Lakhtakia, Qi Hong Wu, Lakshman De Silva, Martin W. McCall

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


Examining the optical response characteristics of structurally chiral piles of identical dielectric plates, we introduce ambichiral and equichiral layered structures in contrast to the finely chiral layered structures that are commonly held to replicate the circular-polarization-discriminatory abilities of cholesteric liquid crystals (CLCs) and chiral sculptured thin films (CSTFs). A finely chiral layered structure, just like CLCs and CSTFs, exhibits the phenomenon of Bragg resonance, for normally incident plane waves of only one circular polarization state. In contrast, an ambichiral layered structure evinces different Bragg resonances for different circular polarization states, while an equichiral layered structure evinces the same Bragg resonances for both circular polarization states.

Original languageEnglish (US)
Pages (from-to)353-358
Number of pages6
JournalOptics Communications
Issue number4-6
StatePublished - Sep 15 2004

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


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