Simultaneous amplification and attenuation in isotropic chiral materials
Tom G. Mackay (University of Edinburgh), Akhlesh Lakhtakia, (Pennsylvania State University)
TL;DR
This paper explores how isotropic chiral materials can be engineered to simultaneously amplify and attenuate electromagnetic waves of different handedness by combining dissipative and active dielectric components.
Contribution
It introduces a method to design composite isotropic chiral materials that can selectively amplify or attenuate Beltrami fields of different handedness using the Bruggeman formalism.
Findings
Beltrami fields of different handedness can be independently controlled.
Composite materials can be designed to exhibit simultaneous amplification and attenuation.
The approach enables tailored electromagnetic responses in chiral media.
Abstract
The electromagnetic field phasors in an isotropic chiral material (ICM) are superpositions of two Beltrami fields of different handedness. Application of the Bruggeman homogenization formalism to two-component composite materials delivers ICMs wherein Beltrami fields of one handedness attenuate whereas Beltrami waves of the other handedness amplify. One component material is a dissipative ICM, the other an active dielectric material.
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