Highly Efficient Broadband Wave Plates Using Dispersion-Engineered High-Index-Contrast Subwavelength Gratings

Liu, Wenxing; Yu, Tianbao; Sun, Yipeng; Lai, Zhenquan; Liao, Qinghua; Wang, Tong-Biao; Yu, Longkun; Chen, Hong

doi:10.1103/physrevapplied.11.064005

Cited by 12 publications

(8 citation statements)

References 27 publications

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“…The meta-mirror operation has been realized for microwaves in the range of 4.5–6.5 GHz, by using circular split-ring resonators (SRRs) 45 . Similarly, a bilayer meta-mirror has been reported for working in the mid-infrared frequency regime 47 .…”

Section: Introductionmentioning

confidence: 74%

Multiband linear and circular polarization rotating metasurface based on multiple plasmonic resonances for C, X and K band applications

Khan

Chen

et al. 2020

Sci Rep

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In this work, a multiband polarization converting metasurface is presented which achieves cross-polarization conversion in five frequency bands while linear-to-circular and circular-to-linear polarization transformation in eight frequency bands. The polarization transforming functionality of the structure is spread over an ultra-wide frequency range (5–37 GHz) covering most of X, C, Ku, K and Ka bands. Such an extraordinary ultra-wideband operation originates from multiple plasmonic resonances occurring in the structure based on two coupled rectangular split-ring resonators. Moreover, the polarization transforming capability is stable within the frequency range 5–19 GHz for wide oblique incidence angles, which is up to 60°, both for transverse-electric and transverse-magnetic polarizations. Furthermore, the proposed structure acts as a meta-mirror which preserves handedness of the circular polarization upon reflection. Measurements performed on the fabricated metasurface are found to be consistent with numerical simulation results. The ability to perform three functionalities through a single compact structure with extraordinary wideband, qualifies the proposed design to be a promising candidate for integration with important microwave applications such as satellite, radar, and 5G communication.

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Section: Introductionmentioning

confidence: 74%

Multiband linear and circular polarization rotating metasurface based on multiple plasmonic resonances for C, X and K band applications

Khan

Chen

et al. 2020

Sci Rep

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“…Metasurfaces open up a new way for designing thinner, lighter, and wider polarization converters than that of the conventional technologies. Some high-efficiency linear to linear and linear to circular polarization converters have been demonstrated in microwave, terahertz, and optical frequency bands (Zhou et al, 2003;Fedotov et al, 2006;Feng et al, 2013;Cheng et al, 2014;Li et al, 2014;Zheng et al, 2014;Shi et al, 2014;Guo et al, 2015;Li et al, 2015;Yin et al, 2015;Han et al, 2016;Zhang L. et al, 2016;Zhang Z. et al, 2016;Zhao and Cheng, 2016;Zhao and Cheng, 2017;Zhang et al, 2017;Li et al, 2019;Liu et al, 2019). But so far, realizing bandwidth expansion, efficiency improvement, angle insensitivity, and functionality extension simultaneously within a simple design is still insufficient.…”

Section: Introductionmentioning

confidence: 99%

Broadband Polarization Manipulation Based on W-Shaped Metasurface

Gao

Chen

et al. 2022

Front. Mater.

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We present a metasurface consisting of W-shaped resonators to realize broadband reflective linear and circular polarization conversions. We find that the cross polarization conversion ratio for normal incidence is over 0.95 from 9.2 to 18.7 GHz, covering 68.1% of the central frequency. We also show that, the conversion performance is almost insensitive to the angle of incident waves. Furthermore, by simply adjusting the geometrical parameters of the W-shaped metasurface, the broadband circular polarization conversion is also achieved. We emphasize that the bandwidth of axis ratio less than 3.0 dB covers from 10.1 to 17.7 GHz, equivalent to 54.7% relative bandwidth. Due to these broadband and high-efficiency polarization conversion features, our proposal may have a wide application prospect.

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“…Thus, metasurfaces can provide both larger anisotropy and wider tunability for polarization control than can natural materials, the characteristics of which are determined by the atomic constituents. A variety of static-polarization-control metasurfaces have been developed in the microwave-to-optical frequency range, including static metasurface polarizers [3,4] and wave plates [5,6,7,8,9,10]. However, for sensitive measurement and communication technologies, dynamic modulation of polarization is an essential requirement.…”

Section: Introductionmentioning

confidence: 99%

Dynamic quarter-wave metasurface for efficient helicity inversion of polarization beyond the single-layer conversion limit

Kobachi,

Miyamaru,

Nakanishi

et al. 2021

Preprint

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Terahertz chiral sensing and polarization-multiplexing communication demand subwavelength devices that dynamically invert polarization helicity. Metasurfaces can enhance anisotropy and fine tunability at subwavelength scales for this purpose. Although metasurfaces enabling deep modulation between orthogonal polarizations have been designed, they suffer from low conversion efficiencies. In this paper, it is shown that the efficiency of conversion from linear to circular polarization by conventional single-layer transmissive metasurfaces cannot exceed a fundamental limit. A dynamic reflective metasurface free from this limitation is then proposed. The device includes multilayer structures working as a terahertz quarter-wave plate with switchable slow and fast axes. A phase transition of vanadium dioxide induces the necessary structural transformation of the metallic patterns. A practical fabrication method, based on the room-temperature bonding technique of sapphires, is presented. Dynamic helicity inversion is demonstrated at 0.90 THz, with a conversion efficiency of over 80 %. This efficiency is beyond the fundamental limit of single-layer transmissive metasurfaces (65 %) and more than four times greater than that of previously reported devices.

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Highly Efficient Broadband Wave Plates Using Dispersion-Engineered High-Index-Contrast Subwavelength Gratings

Cited by 12 publications

References 27 publications

Multiband linear and circular polarization rotating metasurface based on multiple plasmonic resonances for C, X and K band applications

Multiband linear and circular polarization rotating metasurface based on multiple plasmonic resonances for C, X and K band applications

Broadband Polarization Manipulation Based on W-Shaped Metasurface

Dynamic quarter-wave metasurface for efficient helicity inversion of polarization beyond the single-layer conversion limit

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