Abstract
In a lossy media, anisotropic chiral metamaterial (MTM) structures with normal incidence asymmetric transmission of linearly polarized electromagnetic (EM) waves are investigated and analyzed in both microwave and terahertz frequency regimes. The proposed lossy structures are used to perform dynamic polarization rota- tion and consist of square-shaped resonators with gaps on both sides of dielectric substrates with a certain degree of rotation. Asymmetric transmission of a linearly polarized EM wave through the chiral MTMs is realized by experimental and numerical studies. The dynamic structures are adjustable via various parameters to be tuned for any desired frequency regimes. From the obtained results, the suggested structure can be used to design new polarization control devices for desired frequency regimes. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. (DOI: 10.1117/1.OE.53.7.075109)
Highlights
40 years ago, the curiosity of a Russian scientist, Veselago, began the negative index metamaterials (MTMs) process.[1]
Chirality is a very important concept of MTMs for which a negative refractive index can be obtained around the resonance point through both the right- and left-hand circularly polarized waves for different transmission values.[12]
One of the most interesting features that MTMs have, can be used to obtain a negative refractive index for various transmission values around any desired resonance point compared to other procedures for both right and left circularly polarized waves
Summary
40 years ago, the curiosity of a Russian scientist, Veselago, began the negative index metamaterials (MTMs) process.[1]. One of the most interesting features of MTMs that attracts the researchers is that these artificially manufactured structures can provide the opportunity to obtain a negative refractive index. The pioneering study in this area was theoretically proposed by Pendry.[2] The presence of these materials was demonstrated and was experimentally manufactured by Shelby et al.[3] Their work consists of a copper wire and a split-ring resonator system. Chirality is a very important concept of MTMs for which a negative refractive index can be obtained around the resonance point through both the right- and left-hand circularly polarized waves for different transmission values.[12]. We theoretically and experimentally examined and analyzed the asymmetric transmission phenomenon for linearly polarized electromagnetic (EM) waves in both microwave and THz frequency regimes. The proposed dynamic structures that provide asymmetric transmission can be scaled down for any desired frequency range in order to fit any desired application
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