3D Printed Sub-Terahertz All-Dielectric Lens for Arbitrary Manipulation of Quasi-Nondiffractive Orbital Angular Momentum Waves

He, Xiaoyuan; Yang, Yang; Deng, Li; Li, Shufang; Feng, Botao

doi:10.1021/acsami.1c01443

Cited by 19 publications

(7 citation statements)

References 56 publications

(86 reference statements)

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“…Selected methods to meet metasurface fabrication challenges. (a) Commercial 3D printing: an example to produce orbital-angular momentum with sub-terahertz metasurface [122]. Reprinted with permission from [122].…”

Section: Advances In Science and Technology To Meet Challengesmentioning

confidence: 99%

Roadmap on electromagnetic metamaterials and metasurfaces

Cui,

Zhang,

Alù

et al. 2024

J. Phys. Photonics

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Section: Advances In Science and Technology To Meet Challengesmentioning

confidence: 99%

Roadmap on electromagnetic metamaterials and metasurfaces

Cui,

Zhang,

Alù

et al. 2024

J. Phys. Photonics

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“…[37] All-dielectric terahertz metagratings have been used in high-efficiency manipulation of diffraction distribution. [38] The all-dielectric terahertz metalenses have been proposed for flexible manipulation of orbital angular momentum waves, [39][40][41] generation of Airy beam, [42] spinmultiplexed controls, [43,44] achromatic focusing, [45] etc. A varifocal 6G meta-device with a fully tunable range of focal spots is designed by the meta-antennas with reasonably incorporating and rotating several phase profiles.…”

Section: Introductionmentioning

confidence: 99%

All‐Dielectric Integrated Meta‐Antenna Operating in 6G Terahertz Communication Window

Shi,

Li,

Tang

et al. 2024

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Efficient transceivers and antennas at terahertz frequencies are leading the development of 6G terahertz communication systems. The antenna design for high‐resolution terahertz spatial sensing and communication remains challenging, while emergent metallic metasurface antennas can address this issue but often suffer from low efficiency and complex manufacturing. Here, an all‐dielectric integrated meta‐antenna operating in 6G terahertz communication window for high‐efficiency beam focusing in the sub‐wavelength scale is reported. With the antenna surface functionalized by metagrating arrays with asymmetric scattering patterns, the design and optimization methods are demonstrated with a physical size constraint. The highest manipulation and diffraction efficiencies achieve 84.1% and 48.1%. The commercially accessible fabrication method with low cost and easy to implement has been demonstrated for the meta‐antenna by photocuring 3D printing. A filamentous focal spot is measured as 0.86λ with a long depth of focus of 25.3λ. Its application for integrated imaging and communication has been demonstrated. The proposed technical roadmap provides a general pathway for creating high‐efficiency integrated meta‐antennas with great potential in high‐resolution 6G terahertz spatial sensing and communication applications.

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“…Metasurface, a two-dimensional artificial microstructure with periodic or aperiodic arrangement, can flexibly manipulate the magnitude and phase of electromagnetic (EM) waves. The functions of beam scattering, polarization conversion, radar cross-section reduction, and asymmetric transmission are realized by arranging metasurface elements. − Compared to the traditional methods, a metasurface has the advantages of low cost, low loss, easy fabrication, and multiple functions that can be applied for OAM generation. − It is reported that a single metasurface can be designed for dual-mode OAM generation . This method gives a new way to generate OAM beams.…”

Section: Introductionmentioning

confidence: 99%

Transmissive Digital Coding Metasurfaces for Polarization-Dependent Dual-Mode Quad Orbital Angular Momentum Beams

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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In wireless communication systems, a multibeam can be used to increase the number of spatial channels by space-division multiplexing. Furthermore, the multimode is used to enhance the channel capacity by mode-division multiplexing. However, few of the previously reported methods cannot achieve independent controls of orbital angular momentum (OAM) states by transmissive metasurfaces in both space-division and mode-division multiplexing simultaneously. To expand the wireless communication channel, a multilayer transmissive digital coding metasurface with a single emitting source is demonstrated for quad-OAM beam generation with a dual mode. By changing the geometry of the cross dipole for a unit cell, the polarization-dependent 3-bit phase responses are obtained to flexibly manipulate the multi-OAM beams with different modes in preset directions simultaneously. Two types of metasurfaces are designed and fabricated to realize four OAM beams with two topological charges in different directions by encoding the phase sequence in x- and y-directions, which is validated by both theoretical analyses and experimental results. This scheme of transmissive digital coding metasurface provides a simple way to the multiplexing, multichannel, and multiplatform communication and imaging systems.

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3D Printed Sub-Terahertz All-Dielectric Lens for Arbitrary Manipulation of Quasi-Nondiffractive Orbital Angular Momentum Waves

Cited by 19 publications

References 56 publications

Roadmap on electromagnetic metamaterials and metasurfaces

Roadmap on electromagnetic metamaterials and metasurfaces

All‐Dielectric Integrated Meta‐Antenna Operating in 6G Terahertz Communication Window

Transmissive Digital Coding Metasurfaces for Polarization-Dependent Dual-Mode Quad Orbital Angular Momentum Beams

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