Optical chirality breaking in a bilayered chiral metamaterial

Symmetry breaking in a plasmonic metamaterial at optical wavelength.

We numerically study the effect of structural asymmetry in a plasmonic metamaterial made from gold nanowires. It is reported that optically inactive (i.e., optically dark) particle plasmon modes of the symmetric wire lattice are immediately coupled to the radiation field, when a broken structural symmetry is introduced. Such higher order plasmon resonances are characterized by their subradiant ...

Chiral Waves in Graphene Medium and Optical Simulation with Metamaterial

Tailoring Enhanced Optical Chirality: Design Principles for Chiral Plasmonic Nanostructures

Electromagnetic fields with strong optical chirality can be formed in the near field of chiral plasmonic nanostructures. We calculate and visualize the degree of chirality to identify regions with relatively high values. This analysis leads to design principles for a simple utilization of chiral fields. We investigate planar geometries, which offer a convenient way to access the designated fiel...

Optical Chirality Enhancement in Twisted Arrays of Plasmonic Nano-rods

An important property of electromagnetic fields, which arises from the interaction between fields and chiral molecules, is called optical chirality. By enhancing this field property, while maintaining constant input power, we are able to increase absorption of circularly polarized light by chiral molecules of a certain handedness. This enhancement is achieved through the use of achiral plasmoni...

Chiral waves in metamaterial medium

In this paper we will present a brief overview of electromagnetic properties of the media with negative permittivity and permeability, and then we will discuss some ideas about possible applications of these materials. In this work we discuss the chiral waves in metamaterial media. Here we study the conditions for strong chirality which can give situations of chiral metamaterial and we propose ...