Asymmetric transmission of linearly polarized waves and polarization angle dependent wave rotation using a chiral metamaterial

Abstract

An electrically thin chiral metamaterial structure composed of four U-shaped split ring resonator pairs is utilized in order to realize polarization rotation that is dependent on the polarization of the incident wave at 6.2 GHz. The structure is optimized such that a plane wave that is linearly polarized at an arbitrary angle is an eigenwave of the system at this frequency. The analytical relation between the incident polarization and the polarization rotation is derived using transmission matrices. Furthermore, the proposed structure exhibits an asymmetric transmission of linearly polarized waves at 6.2 GHz. Plane waves traveling in opposite but perpendicular directions to the material plane are rotated by different angles. On the other hand, four incident polarization angles have been found for the same structure, at which the transmission is symmetric. The experiment results are in good agreement with the numerical results.

Nonlinear dielectric optomechanical metamaterials

“…[20][21][22][23][24][25][26] Here we introduce the concept of optomechanical metamaterials as a new paradigm for achieving strong optical nonlinearity, optical bistability 27 and asymmetric transmission. [28][29][30][31] Metamaterials are artificial media with unusual and useful electromagnetic properties achieved through subwavelength structuring. 32 They provide a unique platform for manipulating electromagnetic fields, and thereby optical forces, 33,34 on the nanoscale.…”

Diodelike Asymmetric Transmission of Linearly Polarized Waves Using Magnetoelectric Coupling and Electromagnetic Wave Tunneling

“…Accordingly, we choose the separate layers of the metamaterial structure given in Ref. [17] as layers A and C. Adopting the Jones matrix formalism, we relate the electric field amplitudes of incident (I x ; I y ) and transmitted (T x ; T y ) fields [13], for the þz (forward) propagation as follows:…”

Controlling THz and far-IR waves with chiral and bianisotropic metamaterials

“…This design, which can be easily fabricated by direct laser writing [34,35,37], besides its strong optical activity response shows also large asymmetric transmission response, i.e. different transmittance for waves incident from two opposite sides of a structure sample [53][54][55][56][57]. This gives to the structures the ability to be used in polarization isolation related applications.…”