3D Printed Spin‐Decoupled Transmissive Metasurfaces Based on Versatile Broadband Cross‐Polarization Rotation Meta‐Atom

Zhu, Jianfeng; Yang, Yang; Wang, Fan; Lai, Jiexin; Li, Mengze

doi:10.1002/adom.202202416

Cited by 20 publications

(1 citation statement)

References 53 publications

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“…The cascaded multiplane digital images in the propagation direction were employed as the 3D wavefronts, which were encoded into the spin-decoupled metaatoms array, making the outputting circularly polarized waves carrying different image information at different planes. Zhu et al [131] proposed a 3D printed broadband transmissive metasurfaces for spin-decoupled wavefront shaping based on a versatile broadband cross polarization rotation meta-atom. Figure 5(d) shows that two different metasurfaces achieving spin-decoupled anomalous refraction carrying OAM with different topological charges.…”

Section: Spin-decoupled Metasurfacesmentioning

confidence: 99%

Recent advances in electromagnetic metamaterials and metasurfaces for polarization manipulation

Shao,

Zhu

2024

J. Phys. D: Appl. Phys.

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Polarization is an important characteristic of electromagnetic waves that has been exploited in many areas of wave manipulations. While effective control of polarization is highly demanded in various applications, traditional polarization converters have drawbacks such as large volume, narrow operating frequency band, low efficiency, and high losses, hindering themselves from practical applications. Metamaterials and metasurfaces are recently developed artificially structured electromagnetic materials constructed by three- or two-dimensional arrays of meta-atoms with tailored electromagnetic responses, exhibit great potential in controlling the propagation of electromagnetic waves and are highly suitable for flexible control of polarization. Here, we review the recent developments in the field of electromagnetic metamaterials and metasurface for polarization manipulation, focusing on their operation principles and practical applications. We discussed the research progress of chiral metamaterials and anisotropic metasurfaces, and also summarized the achievements of metasurfaces for comprehensive manipulation polarization and phase in recent years. We further summarize the recent achievements on the diversified polarization manipulation functions of metasurfaces. Finally, we discuss reconfigurable metasurfaces that can dynamically control the polarizaiton and wavefronts of electromagnetic waves, including not only electrically reconfigurable metasurfaces with constitutional meta-atoms locally tuned by external stimuli, but also time-modulated metasurfaces exploiting the temporal dimension by applying dynamic switching of the coding sequences. Finally, we look forward to the possible future directions and existing challenges in this rapidly developing field.

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Section: Spin-decoupled Metasurfacesmentioning

confidence: 99%

Recent advances in electromagnetic metamaterials and metasurfaces for polarization manipulation

Shao,

Zhu

2024

J. Phys. D: Appl. Phys.

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Multimaterial Additively Manufactured Transmissive Spin‐Decoupled Polarization‐Maintaining Metasurfaces

Zhu

Lai

et al. 2023

Laser & Photonics Reviews

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Taking advantage of multimaterial additive manufacturing, this work demonstrates a kind of polarization‐maintaining metasurface (MS) for spin‐decoupled beam shaping. The wavefronts of the two spin states, i.e., the left‐hand circular polarization (LHCP) and the right‐hand circular polarization (RHCP), can be independently manipulated while the output spin state remains the same as the input. The meta‐atom is implemented with dual‐polarized antennas at the top and the bottom with phase delay lines connecting them. The dual‐polarized antenna on the receiving side is fixed to receive the LHCP/RHCP incident waves, while the dual‐polarized transmitting antenna is rotated, providing the opposite phase shifts for the LHCP and RHCP. The absolute value of the phase shift is the same as the transmitting antenna's rotation angle. Meanwhile, varying the length of phase delay lines introduces 2π phase shifts for both LHCP and RHCP inputs. Thus, combining the two phase‐shifting degrees of freedom, the LHCP and RHCP wavefronts can be independently controlled while the polarization is not flipped after transmitting through the MS. One MS produces vortex beams with different topological charges for LHCP and RHCP. The other achieves spin‐decoupled focusing. The multilayered MSs are conveniently printed using multimaterial additive manufacturing without postprocessing.

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Self‐Assembly Hybrid Manufacture of Nanoarrays for Metasurfaces

Yu,

Ma,

Wang

et al. 2024

Small Methods

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The development of metasurfaces necessitates the rapid fabrication of nanoarrays on diverse substrates at large scales, the preparation of patterned nanoarrays on both planar and curved surfaces, and even the creation of nanoarrays on prefabricated structures to form multiscale metastructures. However, conventional fabrication methods fall short of these rigorous requirements. In this work, a novel self‐assembly hybrid manufacturing (SAHM) method is introduced for the rapid and scalable fabrication of shape‐controllable nanoarrays on various rigid and flexible substrates. This method can be easily integrated with other fabrication techniques, such as lithography and screen printing, to produce patterned nanoarrays on both planar and non‐developable surfaces. Utilizing the SAHM method, nanoarrays are fabricated on prefabricated micropillars to create multiscale pillar‐nanoarray metastructures. Measurements indicate that these multiscale metastructures can manipulate electromagnetic waves across a range of wavelengths. Therefore, the SAHM method demonstrates the potential of multiscale structures as a new paradigm for the design and fabrication of metasurfaces.

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3D Printed Spin‐Decoupled Transmissive Metasurfaces Based on Versatile Broadband Cross‐Polarization Rotation Meta‐Atom

Cited by 20 publications

References 53 publications

Recent advances in electromagnetic metamaterials and metasurfaces for polarization manipulation

Recent advances in electromagnetic metamaterials and metasurfaces for polarization manipulation

Multimaterial Additively Manufactured Transmissive Spin‐Decoupled Polarization‐Maintaining Metasurfaces

Self‐Assembly Hybrid Manufacture of Nanoarrays for Metasurfaces

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