Achieving wide-band linear-to-circular polarization conversion using ultra-thin bi-layered metasurfaces

Li, Yongfeng; Zhang, Jieqiu; Qu, Shaobo; Wang, Jiafu; Zheng, Lin; Pang, Yongqiang; Xu, Zhuo; Zhang, Anxue

doi:10.1063/1.4906220

Cited by 169 publications

(74 citation statements)

References 19 publications

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“…efficiency and broadband conversions from linear to circular polarizations [86,87]. A bi-layer metasurface comprised of stacked and twisted metallic wire grids shown in figure 10(a) was developed to operate at THz frequencies [86].…”

Section: Linear-to-circular Polarization Conversionmentioning

confidence: 99%

A review of metasurfaces: physics and applications

2016

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Abstract. Metamaterials are composed of periodic subwavelength metal/dielectric structures that resonantly couple to the electric and/or magnetic components of the incident electromagnetic fields, exhibiting properties that not found in nature. This class of micro-and nano-structured artificial media have attracted great interest during the past 15 years and yielded ground-breaking electromagnetic and photonic phenomena. However, the high losses and strong dispersion associated with the resonant responses and the use of metallic structures, as well as the difficulty in fabricating the micro-and nanoscale 3D structures, have hindered practical applications of metamaterials. Planar metamaterials with subwavelength thickness, or metasurfaces, consisting of single-layer or few-layer stacks of planar structures can be readily fabricated using lithography and nanoprinting methods, and the ultrathin thickness in the wave propagation direction can greatly suppress the undesirable losses. Metasurfaces enable a spatially varying optical response (e.g., scattering amplitude, phase, and polarization), mold optical wavefronts into shapes that can be designed at will, and facilitate the integration of functional materials to accomplish active control and greatly enhanced nonlinear response. This paper reviews recent progress in the physics of metasurfaces operating at wavelengths ranging from microwave to visible. We provide an overview of key metasurface concepts such as anomalous reflection and refraction, and introduce metasurfaces based on the PancharatnamBerry phase and Huygens' metasurfaces, as well as their use in wavefront shaping and beam forming applications, followed by a discussion of polarization conversion in fewlayer metasurfaces and their related properties. An overview of dielectric metasurfaces reveals their ability to realize unique functionalities coupled with Mie resonances and their low ohmic losses. We also describe metasurfaces for wave guidance and radiation control, as well as active and nonlinear metasurfaces. Finally, we conclude by providing our opinions of future developments in this rapidly developing research field.

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Section: Linear-to-circular Polarization Conversionmentioning

confidence: 99%

A review of metasurfaces: physics and applications

2016

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“…Furthermore, it should be noticed that the size of the unit cell of the designed CMMs is only λ 0 /11.98 × λ 0 /11.98 × λ 0 /36.17 at 7.15 GHz, where λ 0 is corresponding to the resonance wavelength. Thus, our proposed CMM has some advantages compared with previous CMM in circular polarization extinction ration and ultra-compact structure design [38][39][40].…”

Section: Resultsmentioning

confidence: 96%

“…Then, four U-shaped split ring structures with different sizes [30], planar bi-layer spiral structures [31,32], twisted split ring resonators (SRRs) with double rings [33], Hilbert-shaped structure and other novel asymmetric CMMs [34][35][36][37][38] have afterwards been intensively reported. Among them, nearly all these CMMs could be available to tailor the cross coupling between electric and magnetic fields, resulting in a giant CD effect for circular polarization at resonances [39]. However, multi-band or bandwidth expansion is still a main concern which needs improvement.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Compact Multi-Band Chiral Metamaterial Circular Polarizer Based on Triple Twisted Split-Ring Resonator

Cheng¹,

Cheng³

et al. 2016

PIER

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Abstract-An ultra-compact chiral metamaterial (CMM) using triple-layer twisted split-ring resonators (TSRRs) structure was proposed, which can function as a multi-band circular polarizer. This ultra-compact structure CMM can convert an incident linearly y-polarized (x-polarized) wave propagating along the −z(+z) direction to the transmitted left circularly polarized (LCP) waves at 7.28 GHz, 13.22 GHz and 15.49 GHz while the right circularly polarized (RCP) waves are at 9.48 GHz simultaneously. In addition, the large polarization extinction ratio (PER) of more than 20 dB across four resonance frequencies can be achieved. The experiment results are in good agreement with the numerical simulation results. The surface current distributions of the structure are analyzed to illustrate this linear to circular polarization conversion. The unit cell structure is extremely small both in longitudinal and transverse directions. Good performances and compact design of this CMM suggest promising applications in circular polarizers that need to be integrated with other compact devices.

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“…Latter, miniaturized high-gain reflectarray, 21 transmitarray, 22,23 and hybrid 24 antennas are reported using phase engineering based metasurface. Meta-screens as an efficient converter of polarization using sub-wavelength elements for linear to linear 25,26 and linear to circular [27][28][29] cases are demonstrated. As per author's The work was performed at Department of Electronics Science and Technology, Berhampur University, India knowledge, metasurface based cavity/Fabry-Perot antennas for gain enhancement 30,31 and improved radar cross section (RCS) performance [32][33][34] are realized recently.…”

Section: Introductionmentioning

confidence: 99%

Metasurface cavity antenna for broadband high‐gain circularly polarized radiation

Swain

Mishra

2018

Int J RF Microw Comput Aided Eng

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The article presents a microstrip patch (MSA) fed high gain circularly polarized metasurface cavity (CP‐MSC) antenna using a planar progressively‐phased‐reflector and a transmissive linear to circular polarization conversion metascreen. The bottom metasurface reflector consists of a remodeled Jerusalem cross to obtain 2π reflection phase variation. Linear to circular polarization conversion is achieved by a hexagonal ring based meta‐element with high transmission and bellow 3 dB axial ratio from 9.5 to 10.5 GHz. Simulated and measured results of assembled CP‐MSC antenna with MSA are in good agreement. The gain of the proposed cavity antenna with 10 and 10.5 GHz MSA are 14.9 and 16.3 dBi, respectively. Below 3 dB AR throughout the operating band denotes significant circular polarization performance of the proposed antenna.

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Achieving wide-band linear-to-circular polarization conversion using ultra-thin bi-layered metasurfaces

Cited by 169 publications

References 19 publications

A review of metasurfaces: physics and applications

A review of metasurfaces: physics and applications

Ultra-Compact Multi-Band Chiral Metamaterial Circular Polarizer Based on Triple Twisted Split-Ring Resonator

Metasurface cavity antenna for broadband high‐gain circularly polarized radiation

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