Interference Induced Asymmetric Transmission Through A Monolayer of Anisotropic Chiral Metamolecules

TL;DR

This paper demonstrates how a monolayer of anisotropic chiral metamolecules can produce asymmetric transmission of linear polarizations through interference effects, with controllable amplitude asymmetry via resonances.

Contribution

It introduces a novel mechanism for asymmetric transmission using interference between anisotropy and chirality in metamaterials, supported by an effective medium model.

Findings

Asymmetric transmission achieved via interference effects.

Amplitude asymmetry controllable by spectral resonance tuning.

Provides insights for designing metamaterials with strong asymmetric transmission.

Abstract

We show that asymmetric transmission for linear polarizations can be easily achieved by a monolayer of anisotropic chiral metamolecules through the constructive and destructive interferences between the contributions from anisotropy and chirality. Our analysis is based on the interaction of electromagnetic waves with the constituent electric and magnetic dipoles of the metamaterials, and an effective medium formulation. In addition, asymmetric transmission in amplitude can be effectively controlled by the interference between spectrally detuned resonances. Our findings shed light on the design of metamaterials for achieving strong asymmetric transmission.