Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces

Wang, Xiaopeng; Wan, Lele; Chen, Tianning; Song, Ailing; Du, Xiao-Wen

doi:10.1063/1.4954750

Cited by 15 publications

(10 citation statements)

References 25 publications

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“…Basically, the uniqueness of metasurfaces rested with their ability of easily adjusting the phase and/or amplitude so as to fully control the wave fields. At present, acoustic metasurfaces with various profiles have been proposed for different functions and applications, including (but not limited to) Helmholtz-resonator-like Wang et al, 2016;Zhang et al, 2021), membrane-type (Ma et al, 2014;Tang et al, 2019;Liu et al, 2020), and coiling-up space (Xie et al, 2014;Liang and Li, 2012;N. Almeida et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Coiling-Up Space Metasurface for High-Efficient and Wide-angle Acoustic Wavefront Steering

et al. 2021

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The recent advent of acoustic metasurface displays tremendous potential with their unique and flexible capabilities of wavefront manipulations. In this paper, we propose an acoustic metagrating made of binary coiling-up space structures to coherently control the acoustic wavefront steering. The acoustic wave steering is based on the in-plane coherent modulation of waves in different diffraction channels. The acoustic metagrating structure with a subwavelength thickness is realized with 3D printed two coiling-up space metaunits. By adjusting structural parameters of the metaunits, the −1st-order diffraction mode can be retained, and the rest of the diffraction orders are eliminated as much as possible through destructive interference, forming a high-efficiency anomalous reflection in the scattering field. The anomalous reflection performance of the designed metagrating is achieved over a wide range of incident angles with high efficiency.

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Section: Introductionmentioning

confidence: 99%

Coiling-Up Space Metasurface for High-Efficient and Wide-angle Acoustic Wavefront Steering

et al. 2021

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“…During recent years, so-called 'metasurfaces' [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], constituting the 2D equivalent of bulk metamaterials, have received increasing attention since they have subwavelength thickness, low losses, and simpler to fabricate. Metasurfaces have subwavelength textured surfaces and can impart discontinuities on electromagnetic wavefronts.…”

Section: Introductionmentioning

confidence: 99%

“…Yu et al [1] firstly demonstrated a V-shaped gold special nanoantenna-array gradient phase metasurface, which could provide abrupt phase discontinuities for light propagating through the interface and drastically change the flow of reflected and refracted light. Followed by Yu, various metal-based gradient phase metasurfaces have been designed [5][6][7][8][9][10][11][12][13][14][15][16][17]. For instance, a metamaterial Huygens' surface was developed to efficiently refract a normally incident plane wave to an angle from normal [5,6].…”

Section: Introductionmentioning

confidence: 99%

A broadband high-transmission gradient phase discontinuity metasurface

Liu

Song

et al. 2018

J. Phys. D: Appl. Phys.

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Metasurfaces have attracted significant attention due to the control of the electromagnetic waves that they enable. In this paper, we demonstrate a high-transmission gradient phase discontinuity metasurface composed of metallic rods and cylindrical dielectric resonators operating at a broadband microwave frequency from 8 GHz to 9.8 GHz, with a fractional bandwidth of 20.2%. The proposed gradient phase discontinuity metasurface can achieve complete 2π transmission phase coverage with π/4 phase intervals by varying the geometric parameters of the dielectric resonators and metallic rods. It is shown that the proposed metasurface can refract a normally incident plane wave to an angle of 30°. The broadband metasurface is flexible, and the refracted angle can be adjusted easily by varying the lattice constant. Besides the broadband anomalous refraction, we also demonstrate the metasurface can produce an interesting vortex and wave-focusing in the wide frequency range from 8 GHz to 9.8 GHz. Finally, we demonstrate that the present metasurface can tailor interference wavefronts to plane wavefronts.

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“…Based on this principle, the anomalous reflection and anomalous refraction of electromagnetic waves were realized by using the gradient-phase metasurface. Then, the research and application of phase-gradient metasurface (PGMS) have become hotspots [6][7][8][9][10][11]. Pu [12] of the Chinese Academy of Sciences, using the symmetrical T-shaped structure, proposed a metasurface element covering (0°, 360°) within the X-band, and successfully achieved anomalous reflection.…”

Section: Introductionmentioning

confidence: 99%

Design of single-layer high-efficiency transmitting phase-gradient metasurface and high gain antenna

Zhang¹,

Yang²,

Su³

et al. 2017

J. Phys. D: Appl. Phys.

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In this paper, based on rotation phase-gradient principle, a single-layer, high-efficiency transmitting metasurface is designed and applied to high-gain antenna. In the case of circularly polarized incident wave, the PCR (polarization conversions ratio) of the metasurface element is greater than 90% in the band of 9.11-10.48 GHz. The transmitting wave emerges an anomalous refraction when left-handed circularly polarized wave are incident perpendicularly to the 1D phase-gradient metasurface, which is composed of cycle arrangement of 6 units with step value of 30°. The simulated anomalous refraction angle is 40.1°, coincided with the theoretical design value (40.6°). For further application, the 2D focused metasurface is designed to enhance the antenna performance while the left-handed circularly polarized antenna is placed at the focus. The simulated max gain is increased by 12 dB (182%) and the half-power beamwidth is reduced by 74.6°. The measured results are coincided with the simulations, which indicates the antenna has high directivity. The designed single-layer transmission metasurface has advantages of thin thickness (only 1.5 mm), high efficiency and light weight, and will have important application prospects in polarization conversion and beam control.

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Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces

Cited by 15 publications

References 25 publications

Coiling-Up Space Metasurface for High-Efficient and Wide-angle Acoustic Wavefront Steering

Coiling-Up Space Metasurface for High-Efficient and Wide-angle Acoustic Wavefront Steering

A broadband high-transmission gradient phase discontinuity metasurface

Design of single-layer high-efficiency transmitting phase-gradient metasurface and high gain antenna

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