Rotatory power reversal induced by magnetic-current in bi-isotropic media

TL;DR

This paper investigates how magnetic conductivity in bi-isotropic media causes optical effects like rotatory power reversal and handedness reversion, revealing new phenomena linked to chiral magnetic currents.

Contribution

It introduces the concept of magnetic-current-induced rotatory power reversal in bi-isotropic media, highlighting novel optical effects and signatures of chiral magnetic currents.

Findings

Dispersive rotatory power changes sign at specific frequencies.

Antisymmetric magnetic conductivity leads to handedness reversion.

Sign reversal of rotatory power indicates presence of chiral magnetic current.

Abstract

Bi-isotropic media constitute a proper scenario for scrutinizing optical effects stemming from magnetoelectric parameters. Chiral magnetic current is a macroscopic effect arising from the chiral magnetic effect that enriches the phenomenology of a classical dielectric medium. This work examines optical aspects of bi-isotropic media in the presence of magnetic conductivity. The full isotropic scenario manifests circular birefringence described by a dispersive rotatory power that changes sign at a given frequency. For a bi-isotropic medium with antisymmetric magnetic conductivity, an intricate dispersive rotatory power is attained, supplied with sign reversal as well. This scenario also indicates a handedness reversion of the medium, an unusual property in dielectrics, which may work as a signature of bi-isotropic media supporting chiral magnetic current.