Anisotropy Modeling of Terahertz Metamaterials: Polarization Dependent Resonance Manipulation by Meta-Atom Cluster

Abstract

Recently metamaterials have inspired worldwide researches due to their exotic properties in transmitting, reflecting, absorbing or refracting specific electromagnetic waves. Most metamaterials are known to have anisotropic properties, but existing anisotropy models are applicable only to a single meta-atom and its properties. Here we propose an anisotropy model for asymmetrical meta-atom clusters and their polarization dependency. The proposed anisotropic meta-atom clusters show a unique resonance property in which their frequencies can be altered for parallel polarization, but fixed to a single resonance frequency for perpendicular polarization. The proposed anisotropic metamaterials are expected to pave the way for novel optical systems.

Tailoring Active Far-Infrared Resonator with Graphene Metasurface and Its Complementary

“…4a) of the composite, hereby rotating the graphenebased SRR. While in metallic metamaterial [26], the anisotropic polarization dependence has been realized by increasing the propagation length at the sacrifice of spectral resolution, the drawbacks of which can be avoided in graphene. Furthermore, Fig.…”

“…Different from the metallic SRR in which the anisotropic properties rely on the fundamental LC resonance and half-wave resonance along the side length of SRR unit cell at THz frequency [26], the dipole interaction in graphene causes splitting of plasmon due to the strong localized nature. In Fig.…”

Investigation of microwave metamaterial based on H-shaped resonator in a waveguide configuration and its sensor and absorber applications

“…Note that, there are some studies related with HSRs (different version of HSRs) in the area of MTMs for various frequencies and they have been used in numerous applications such as couplers, anti-reflection coatings, absorbers, filters, frequency-selective-surfaces, optical systems, controllable GHz and THz devices, and so on. [19][20][21][22][23][24][25][26][27] The main motive of this study is to realize and characterize the mentioned new MTM in a waveguide configuration by monitoring the behaviors belonging to MTMs to be used in several waveguide applications (i.e. sensor and absorber).…”

Designing perfect linear polarization converters using perfect electric and magnetic conducting surfaces

“…These approaches, although prevail in modern laboratories, are unfortunately bulky and heavy, and thus being not suitable for miniaturized integrations. Such a problem can be mitigated with the help of advanced designs based on metasurfaces, as witnessed in the past decade234567891011. The building elements of the metasurfaces are the so-called unit cells, of which the dimensions are much smaller comparing to the working wavelengths.…”