Broadband High-Efficiency Ultrathin Metasurfaces With Simultaneous Independent Control of Transmission and Reflection Amplitudes and Phases

Wang, Yufang; Ge, Yuehe; Chen, Zhizhang; Liu, Xin; Pu, Jixiong; Liu, Kaiting; Chen, Huanyang; Hao, Yang

doi:10.1109/tmtt.2021.3119376

Cited by 56 publications

(28 citation statements)

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“…Abrupt phase changes can be introduced on ultrathin metasurfaces, leading to anomalous reflections and refractions that can be explained by generalized laws of reflection and refraction or called generalized Snell’s law 20 . They provide an alternative and efficient way to realize intriguing electromagnetic phenomena and devices, such as photonic spin Hall effect 24 , planar holograms 25 , polarization converters 21 , 26 , anomalous beam generators 20 , 27 , focusing lenses 28 – 32 . The planar gradient metasurfaces, based on the principle of rotatable Risley prisms, have been exploited for the design of low-profile scanning antennas operating in the microwave and millimeter-wave range 33 – 41 .…”

Section: Introductionmentioning

confidence: 99%

Analytic solution for double optical metasurface beam scanners

Wang

Chen

et al. 2022

Sci Rep

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Optical metasurfaces are researched more and more intensively for the possible realization of lightweight and compact optical devices with novel functionalities. In this paper, a new beam-steering system based on double metasurface lenses (metalenses) is proposed and developed. The proposed system is lightweight, small volume, low cost, and easy to integrate. The exact close-form forward and numerical inverse solutions are derived respectively using the generalized Snell’s law of refraction. Given the orientations of the double metalenses, the pointing position can be accurately determined. If the desired pointing position is given, the required metalenses’ orientations can be obtained by applied global optimization algorithms to solve nonlinear equations related to the inverse problem. The relationships of the scan region and blind zone with the system parameters are derived. The method to eliminate the blind zone is given. Comparison with double Risley-prism systems is also conducted. This work provides a new approach to control light beams.

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Section: Introductionmentioning

confidence: 99%

Analytic solution for double optical metasurface beam scanners

Wang

Chen

et al. 2022

Sci Rep

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“…The use of the recently developed metamaterials and metasurfaces 19 present new planar RAs 12,13,20,21 and TAs. [14][15][16][17][18]22,23 Metasurfaces allow abrupt phase shifts. 18 They are compact and low-cost electromagnetic devices with good performances.…”

Section: Introductionmentioning

confidence: 99%

“…18 They are compact and low-cost electromagnetic devices with good performances. [12][13][14][15][16][17][18][19][20][21][22][23] In general, two types of phase-shifting metasurfaces: one is based on the resonant inclusions, [12][13][14][16][17][18][20][21][22][23][24] and the other applies the geometric Pancharatnam-Berry (PB) method. 15,25 The former is suitable for incident waves with any polarization, 24 while the latter is mainly used for applications that require circulation polarization (CP) such as satellites, radio astronomy, and terrestrial communication.…”

Section: Introductionmentioning

confidence: 99%

“…The use of the recently developed metamaterials and metasurfaces 19 present new planar RAs 12,13,20,21 and TAs 14–18,22,23 . Metasurfaces allow abrupt phase shifts 18 .…”

Section: Introductionmentioning

confidence: 99%

“…Metasurfaces allow abrupt phase shifts 18 . They are compact and low‐cost electromagnetic devices with good performances 12–23 . In general, two types of phase‐shifting metasurfaces: one is based on the resonant inclusions, 12–14,16–18,20–24 and the other applies the geometric Pancharatnam‐Berry (PB) method 15,25 .…”

Section: Introductionmentioning

confidence: 99%

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A broadband circularly polarized multi‐beam folded transmitarray antenna

Chen

et al. 2022

Int J RF Mic Comp-Aid Eng

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The multi‐beam reflectarray and transmitarray (TA) antennas are new antennas that can have wide angular coverage. However, they are generally of large profiles. To address the issue, this article proposes a folded TA antenna of high gain and low profile that can produce circularly polarized (CP) multi‐beams. It consists of a main‐reflector, a TA, and a linearly polarized (LP) planar feeding array. It reflects an incident electromagnetic wave twice and converts polarization three times. It has a metasurface that carries out the broadband LP‐to‐CP conversion. A prototype is developed with a height of 1.8λ at 13 GHz. The experimental results show that the antenna can achieve a scanning range of ±10°, a peak gain of 22 dBi, and an aperture efficiency of 20.8%. It has a 3‐dB axial ratio bandwidth of 2.2 GHz (or 16.6%), covering 12.1–14.3 GHz. It features a low profile, high gain, low cost, and easy integration with communication systems (e.g., MIMO transceiver systems).

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Multiple Orbital Angular Momentum Beams with High‐Purity of Transmission‐Coding Metasurface

Liu

et al. 2023

Advcd Theory and Sims

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Vortex electromagnetic wave carrying orbital angular momentum (OAM) is expected to break through the shortage of spectrum resource because of its multiple independent modes. Nowadays, there are various methods to generate OAM vortex beam. Based on the concepts of digital metasurface and propagation phase, a broadband 3-bit coding transmission metasurface is designed and illustrated by simulation and measurement. The elements exhibit the different phase by changing the size of metal patch, and the focusing phase is introduced to reduce the divergence of OAM beams. Based on the principle of phase superposition, the wide-band, high-purity, and multi-beam OAM vortex waves can be generated by the transmission-coding metasurface (TCMS). The experimental results verify that TCMS realizes the multiple OAM beams along different directions simultaneously from 9 to 10.5 GHz, which are consistent with the theoretical results. The high purity more than 90% of OAM mode is demonstrated by both the simulated and measured results. The TCMS provides a potential and effective scheme for OAM multiplexing and multi-target positioning in wireless systems.

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Broadband High-Efficiency Ultrathin Metasurfaces With Simultaneous Independent Control of Transmission and Reflection Amplitudes and Phases

Cited by 56 publications

References 56 publications

Analytic solution for double optical metasurface beam scanners

Analytic solution for double optical metasurface beam scanners

A broadband circularly polarized multi‐beam folded transmitarray antenna

Multiple Orbital Angular Momentum Beams with High‐Purity of Transmission‐Coding Metasurface

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