Polarization-universal rejection filtering by ambichiral structures made of indefinite dielectric-magnetic materials

Abstract

An ambichiral structure comprising sheets of an anisotropic dielectric material rejects normally incident plane waves of one circular polarization (CP) state but not of the other CP state, in its fundamental Bragg regime. However, if the same structure is made of an dielectric-magnetic material with indefinite permittivity and permeability dyadics, it may function as a polarization-universal rejection filter because two of the four planewave components of the electromagnetic field phasors in each sheet are of the positive-phase-velocity type and two are of the negative-phasevelocity type.

Negatively refracting chiral metamaterials: a review

“…This property-which arises because two of the four planewave components in each sheet are of the NPV type and two are of the positive-phase-velocity type-enables such an ambichiral material to function as a polarization-universal rejection filter [116].…”