Double rotatory power reversal, continuous Kerr angle, and enhanced reflectance in bi-isotropic media with anomalous Hall current

TL;DR

This paper explores unique optical phenomena in bi-isotropic materials influenced by the anomalous Hall effect, revealing double sign reversal in rotatory power, giant Kerr rotation, and enhanced reflectance due to negative refraction.

Contribution

It introduces the first analysis of optical signatures like double sign reversal and giant Kerr rotation in bi-isotropic media with anomalous Hall effect, highlighting their singular optical properties.

Findings

Circular birefringence with double sign reversal

Giant Kerr rotation without discontinuity

Enhanced reflectance exceeding unity due to negative refraction

Abstract

We investigate the optical properties of bi-isotropic materials under the anomalous Hall effect (AHE) of axion electrodynamics. Four refractive indices associated with circularly polarized waves are achieved, implying circular birefringence with rotatory power endowed with double sign reversal, an exotic optical signature for chiral dielectrics. The Kerr rotation and ellipticity are analyzed, with an unusual observation of a giant rotation angle deprived of discontinuity. Anomalous enhanced reflectance (R greater than unity) is also reported, associated with negative refraction stemming from the anomalous transport properties. These effects constitute the singular optical signature of a nonequilibrium bi-isotropic medium with the AHE.