On circular Bragg regimes in ellipsometry spectra of ambichiral sculptured thin films

TL;DR

This paper investigates the circular Bragg regimes in the ellipsometry spectra of ambichiral sculptured thin films, revealing abrupt spectral changes associated with maximized circular transmission.

Contribution

It applies generalized ellipsometry to ambichiral thin films to identify and analyze circular Bragg regimes and their spectral characteristics.

Findings

Circular Bragg regimes cause abrupt spectral changes.

Maximized circular transmission occurs at specific wavelengths.

Ellipsometry spectra reveal distinct amplitude and phase features.

Abstract

The generalized ellipsometry formalism is used for a right handed ambichiral sculptured thin film.The amplitude ratios and phase differences of this structure are extracted from the amplitude transmission ratios. The results showed that the circular Bragg regimes appear with abruptly changes in ellipsometry spectrum as wavelength, where the selective circular transmission is maximized.