Spectral and polarization effects in deterministically nonperiodic multilayers containing optically anisotropic and gyrotropic materials

TL;DR

This paper investigates how anisotropy and gyrotropy affect the optical properties of fractal multilayer nanostructures, revealing uniform polarization rotation and resonant polarization control without spectral shifts, with applications in integrated optics.

Contribution

It provides a theoretical analysis of gyrotropy's effects on polarization in fractal multilayers, introducing novel polarization control mechanisms in nanostructures.

Findings

Gyrotropy uniformly rotates output polarization in bi-isotropic multilayers.

Isotropic gyrotropy resonantly alters output polarizations in polarization splitters.

Designs for frequency-selective, absorptionless polarizers are proposed.

Abstract

Influence of material anisotropy and gyrotropy on optical properties of fractal multilayer nanostructures is theoretically investigated. Gyrotropy is found to uniformly rotate the output polarization for bi-isotropic multilayers of arbitrary geometrical structure without any changes in transmission spectra. When introduced in a polarization splitter based on a birefringent fractal multilayer, isotropic gyrotropy is found to resonantly alter output polarizations without shifting of transmission peak frequencies. The design of frequency-selective absorptionless polarizers for polarization-sensitive integrated optics is outlined.