Journal ArticleDOI
Broadband waveplate operation by orthotropic metasurface reflector
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TLDR
In this paper, an anisotropic metasurface is proposed for linear to cross-polarization conversion and linear to circular polarization conversion operations on large bandwidths of microwave frequencies.Abstract:
We present an anisotropic metasurface offering a simultaneous linear to cross-polarization conversion and linear to circular polarization conversion operations on large bandwidths of microwave frequencies. The proposed orthotropic structure consists of metallic bow tie shaped patches with embedded circular patches enabling diagonal structure symmetry. We demonstrate through numerical simulations and experiments that the metasurface can be used as a high efficiency linear to cross-polarization reflective converter within the two broad frequency bands of 7.48–10.55 GHz and 18.47–19.52 GHz with a polarization conversion ratio above 90%. Simultaneously, the designed metasurface acts as a circular polarizer for linearly polarized incident waves in triple frequency bands of 6.10–7.46 GHz, 10.55–18.42 GHz, and 19.60–22.39 GHz with an axial ratio below the 3 dB threshold. To the best of our knowledge, the second band from 10.55 to 18.42 GHz of circular polarization conversion “has the highest reported (to date) bandwidth of 54.3% for an axial ratio below 3 dB.” The designed metasurface remains angular stable up to 75 ° over most of the part of the above-mentioned operating bands for both transverse-electric and transverse-magnetic polarized wave incidences.read more
Citations
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Design and experimental analysis of dual-band polarization converting metasurface for microwave applications
TL;DR: The reflection characteristics of a thin and dual-band metasurface are examined in the microwave frequency regime and it has been estimated that the surface has the additional ability to convert linearly polarized waves to circularly polarized waves at several distinct frequencies.
Journal ArticleDOI
A linear to circular polarization reconfigurable converter based on frequency selective surface
Journal ArticleDOI
A novel composite transmission metasurface with dual functions and its application in microstrip antenna
TL;DR: In this article, a novel composite transmission metasurface (NCTM) with dual functions of linear to circular polarization conversion and polarization selection is proposed and verified, and the results of simulation and experiment show that the linearly polarized microstrip antenna with NCTM can realize circularly polarized radiation with an axial ratio less than 3dB and a significant gain improvement simultaneously.
Journal Article
Anisotropic Metasurface with Near-Unity Circular Polarization Conversion
TL;DR: In this article, a bi-layer ultrathin anisotropic metasurface was proposed to convert the circular-polarized electromagnetic wave to its cross polarization. But, the resonance frequency of the metamodel was not optimized.
References
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Journal ArticleDOI
Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction
Nanfang Yu,Patrice Genevet,Patrice Genevet,Mikhail A. Kats,Francesco Aieta,Francesco Aieta,Jean-Philippe Tetienne,Jean-Philippe Tetienne,Federico Capasso,Zeno Gaburro,Zeno Gaburro +10 more
TL;DR: In this article, a two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint phase discontinuities on propagating light as it traverses the interface between two media.
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Planar Photonics with Metasurfaces
TL;DR: Progress in the optics of metasurfaces is reviewed and promising applications for surface-confined planar photonics components are discussed and the studies of new, low-loss, tunable plasmonic materials—such as transparent conducting oxides and intermetallics—that can be used as building blocks for metAsurfaces will complement the exploration of smart designs and advanced switching capabilities.
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Dielectric metasurfaces for complete control of phase and polarization with subwavelength spatial resolution and high transmission
TL;DR: A metasurface platform based on high-contrast dielectric elliptical nanoposts that provides complete control of polarization and phase with subwavelength spatial resolution and an experimentally measured efficiency ranging from 72% to 97%, depending on the exact design.
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Generating optical orbital angular momentum at visible wavelengths using a plasmonic metasurface
Ebrahim Karimi,Sebastian A. Schulz,Israel De Leon,Hammam Qassim,Jeremy Upham,Robert W. Boyd,Robert W. Boyd +6 more
TL;DR: Karimi et al. as mentioned in this paper showed that a plasmonic metasurface comprising an array of nano-antennas can couple spin-to-orbital angular momentum at thickness much smaller than the wavelength of the light with an efficiency of around 3%.
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Ultrawideband and High-Efficiency Linear Polarization Converter Based on Double V-Shaped Metasurface
TL;DR: In this paper, a double V-shaped metasurface that can efficiently convert linear polarizations of electromagnetic (EM) waves in wideband is proposed, which can be used in many applications, such as reflector antennas, imaging systems, remote sensors, and radiometers.