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Completely disordered systems are suitable for large‐scale fabrication and may host non‐trivial optical properties. In article number 2000151 by Victor S. Asadchy, Shanhui Fan, and co‐workers, the designed colloid metamaterial exhibits isotropic chirality three orders of magnitude larger than known natural and artificial materials. Such giant chirality is achieved through dense packing of dielectric...
In this talk, design and realization of a single-layer meta-transmitarray which provides a certain functionality in a narrow frequency band while remains reflectionless (transparent) elsewhere is presented. Realization of such transmitarrays would allow integrating several metasurfaces in a cascade that performs different functionalities at different frequencies, opening a door for various new applications...
In this work we introduce a planar ground-free terahertz absorber suitable for large-area manufacturing. The lack of a ground plane in the absorber design may pave the way for frequency-selective response that is an essential requirement for invisible sensors and wave filters. The absorber is to be manufactured using state-of-the-art techniques of large-area printing, within the frame of a joint project...
We realized and experimentally tested a conceptually new kind of electrically thin absorbers of electromagnetic waves. The idea is to utilize a single layer of precisely designed meta-atoms. This allows one to design an absorber with unprecedentedly small thickness. The absorber implies absence of a ground plane. High efficiency of the realized structure in the S band is demonstrated. The conceptual...
In this article we study scattering of plane electromagnetic waves by a metal cylinder surrounded by straight copper wires. Possibility to achieve partial recovery of the wave front behind the cylinder is demonstrated with certain parameters of the wires and their location in the structure. Reconstruction of the wave front is observed in frequency range from 3.04 GHz to 3.15 GHz.
Uniaxial electrically thin layers formed by arrays of smooth helices are under study. Simple and smooth shape of the helices makes them more preferable from experimental point of view in comparison to other chiral particles. Here we optimize by simulation mutual orientation and density of the helices in the array so that it acts as a twist-polarizer or a perfect absorber.
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