Flexible chiral metamaterials with dynamically optical activity and high negative refractive index

Abstract

We demonstrate numerically and experimentally chiral metamaterials (MTMs) based on gammadion-bilayer cross-wires that uniaxially create giant optical activity and tunable circular dichroism as a result of the dynamic design. In addition, the suggested structure gives high negative refractive index due to the large chirality in order to obtain an efficient polarization converter. We also present a numerical analysis in order to show the additional features of the proposed chiral MTM in detail. Therefore, a MTM sensor application of the proposed chiral MTM is introduced and discussed. The presented chiral designs offer a much simpler geometry and more efficient outlines. The experimental results are in a good agreement with the numerical simulation. It can be seen from the results that, the suggested chiral MTM can be used as a polarization converter, sensor, etc. for several frequency regimes.

Switchable terahertz polarization converter based on VO2 metamaterial

“…However, in the fields of THz communication, [4] imaging, [5,6] sensing, [7] and detection, [8,9] it is necessary to dynamically control the polarization state of the THz wave. The polarization converter can control the polarization state of electromagnetic (EM) waves by designing anisotropic, [10] and the traditional polarization converter is composed of polarizer [11] and wave plate, [12] which are not conducive to the integration [13] of equipment. Metamaterial [14] is an artificial material consisting of periodic sub-wavelength structures with unique EM properties, such as negative dielectric constant [15] and negative refractive index.…”

Functional Pressure and Density Sensor Design Based on Metamaterial Absorber

“…Sinyal emici MTM (SEMTM) kavramı Landy ve arkadaşları tarafından 2008 yılında ortaya atıldıktan sonra, son yıllarda araştırma alanı olarak oldukça fazla ilgi görmektedir [23]. SEMTM'lerle mikrodalga, terahertz, kızıl ötesi ve optik frekans alanlarıyla ilgili bir çok çalışma yapılmaktadır [24][25][26][27]…”

New design of multi-band negative-index metamaterial and absorber at visible frequencies

“…sub-wavelength resolution, 3 perfect absorbers, 4 inversed Doppler effect, 5 electromagnetic cloak, 6 and other characteristics, [7][8][9] which are unattainable from naturally occurring materials. Hence, NIMs with reasonable pre-designed properties can be considerably applied in physics, materials, and engineering.…”