Experimental investigation of circular Bragg phenomenon exhibited by a mirror-backed chiral sculptured thin film
Sema Erten, Stephen E. Swiontek, Christian M. Graham, Akhlesh, Lakhtakia
TL;DR
This paper experimentally investigates the circular Bragg phenomenon in chiral sculptured thin films with and without a mirror backing, revealing how the mirror influences the reflectance spectra and the manifestation of the phenomenon.
Contribution
It provides new experimental insights into how mirror backing affects the circular Bragg phenomenon in chiral sculptured thin films.
Findings
All four circular reflectances show strong evidence of the phenomenon with mirror backing.
Without the mirror, the phenomenon appears mainly in co-polarized and co-handed reflectance.
Mirror presence alters the spectral characteristics of the circular Bragg effect.
Abstract
Experimentation with obliquely incident light established that all four circular reflectances of a chiral sculptured thin film backed by a metallic mirror contain strong evidence of the circular Bragg phenomenon. When the mirror is removed, strong evidence of that phenomenon is found only in the spectrum of the co-polarized and co-handed reflectance.
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