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  • Online Resource  (7)
  • Zhang, Kuang  (7)
  • 1
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    A non-interleaved bidirectional Janus metasurface with full-space scattering channels
    Walter de Gruyter GmbH ; 2022
    In:  Nanophotonics Vol. 11, No. 16 ( 2022-08-17), p. 3729-3739
    Details
    In: Nanophotonics, Walter de Gruyter GmbH, Vol. 11, No. 16 ( 2022-08-17), p. 3729-3739
    Abstract: Metasurfaces have attracted broad interest thanks to their unprecedented capacity for electromagnetic wavefront manipulation. The compact, ultrathin and multifunctional metasurface calls for novel design principles. Here, we propose and experimentally demonstrate a non-interleaved and non-segmented bidirectional Janus metasurface that encodes multiple functionalities in full-space scattering channels with different propagation directions and polarization in the microwave region. Specifically, by rotating and adjusting the elementary double-arrow-shaped structure within the same meta-atom, the independent phase control can be achieved in both cross-polarized transmission and co-polarized reflection components under oppositely directed incident waves. Our metasurface with broken mirror symmetry can fully exploit four independent information channels under opposite propagation directions. A series of proof-of-concept is constructed to validity of our methodology, and the simulations and experimental results further show that the proposed non-interleaved bidirectional metasurface can provide an attractive platform for various applications, ranging from structured light conversion, optical imaging, multifunctional optical information processing and others.
    Type of Medium: Online Resource
    ISSN: 2192-8614
    URL: Article
    DOI: 10.1515/nanoph-2022-0292
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2022
    detail.hit.zdb_id: 2674162-3
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  • 2
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    Metasurface Holography in the Microwave Regime
    MDPI AG ; 2021
    In:  Photonics Vol. 8, No. 5 ( 2021-04-22), p. 135-
    Details
    In: Photonics, MDPI AG, Vol. 8, No. 5 ( 2021-04-22), p. 135-
    Abstract: Hologram technology has attracted a great deal of interest in a wide range of optical fields owing to its potential use in future optical applications, such as holographic imaging and optical data storage. Although there have been considerable efforts to develop holographic technologies using conventional optics, critical issues still hinder their future development. A metasurface, as an emerging multifunctional device, can manipulate the phase, magnitude, polarization and resonance properties of electromagnetic fields within a sub-wavelength scale, opening up an alternative for a compact holographic structure and high imaging quality. In this review paper, we first introduce the development history of holographic imaging and metasurfaces, and demonstrate some applications of metasurface holography in the field of optics. We then summarize the latest developments in holographic imaging in the microwave regime. These functionalities include phase- and amplitude-based design, polarization multiplexing, wavelength multiplexing, spatial asymmetric propagation, and a reconfigurable mechanism. Finally, we conclude briefly on this rapidly developing research field and present some outlooks for the near future.
    Type of Medium: Online Resource
    ISSN: 2304-6732
    URL: Article
    DOI: 10.3390/photonics8050135
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2770002-1
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  • 3
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    Transmission–Reflection-Integrated Multiplexed Janus Metasurface
    American Chemical Society (ACS) ; 2021
    In:  ACS Applied Electronic Materials Vol. 3, No. 6 ( 2021-06-22), p. 2638-2645
    Details
    In: ACS Applied Electronic Materials, American Chemical Society (ACS), Vol. 3, No. 6 ( 2021-06-22), p. 2638-2645
    Type of Medium: Online Resource
    ISSN: 2637-6113 , 2637-6113
    URL: Article
    DOI: 10.1021/acsaelm.1c00246
    Language: English
    Publisher: American Chemical Society (ACS)
    Publication Date: 2021
    detail.hit.zdb_id: 2949097-2
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  • 4
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    Design of a frequency-multiplexed metasurface with asymmetric transmission
    Optica Publishing Group ; 2022
    In:  Optics Letters Vol. 47, No. 17 ( 2022-09-01), p. 4504-
    Details
    In: Optics Letters, Optica Publishing Group, Vol. 47, No. 17 ( 2022-09-01), p. 4504-
    Abstract: Metasurfaces presenting diversified functionalities have broadened the prospect of manipulating the phase, amplitude, and polarization from the optical to microwave fields. Although the frequency-multiplexing strategy is one of the intuitive and effective approaches to expand the number of channels, demonstrations reporting on the combination between directional asymmetric transmission and frequency-multiplexing via an ultrathin flat device are limited. In this study, a novel, to the best of our knowledge, strategy is proposed to generate four independent holographic images under opposite illumination directions at two operating frequencies, utilizing a single metasurface composed of two types of metallic resonators and one grating layer. Specifically, each scattering channel with independent information makes full use of the whole metasurface. Simulation and experimental results show good agreement, highlighting the attractive capabilities of the multi-functional metasurface platform, which provides more freedom for the manipulation of electromagnetic waves.
    Type of Medium: Online Resource
    ISSN: 0146-9592 , 1539-4794
    URL: Article
    DOI: 10.1364/OL.464854
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2022
    detail.hit.zdb_id: 243290-0
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  • 5
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    A Fully Phase‐Modulated Metasurface as An Energy‐Controllable Circular Polarization Router
    Wiley ; 2020
    In:  Advanced Science Vol. 7, No. 18 ( 2020-09)
    Details
    In: Advanced Science, Wiley, Vol. 7, No. 18 ( 2020-09)
    Abstract: Geometric metasurfaces primarily follow the physical mechanism of Pancharatnam–Berry (PB) phases, empowering wavefront control of cross‐polarized reflective/transmissive light components. However, inherently accompanying the cross‐polarized components, the copolarized output components have not been attempted in parallel in existing works. Here, a general method is proposed to construct phase‐modulated metasurfaces for implementing functionalities separately in co‐ and cross‐polarized output fields under circularly polarized (CP) incidence, which is impossible to achieve with solely a geometric phase. By introducing a propagation phase as an additional degree of freedom, the electromagnetic (EM) energy carried by co‐ and cross‐polarized transmitted fields can be fully phase‐modulated with independent wavefronts. Under one CP incidence, a metasurface for separate functionalities with controllable energy repartition is verified by simulations and proof‐of‐principle microwave experiments. A variety of applications can be readily expected in spin‐selective optics, spin‐Hall metasurfaces, and multitasked metasurfaces operating in both reflective and transmissive modes.
    Type of Medium: Online Resource
    ISSN: 2198-3844 , 2198-3844
    URL: Issue
    URL: Article
    DOI: 10.1002/advs.v7.18
    DOI: 10.1002/advs.202001437
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2808093-2
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  • 6
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    Coding metasurface holography with polarization-multiplexed functionality
    AIP Publishing ; 2021
    In:  Journal of Applied Physics Vol. 129, No. 3 ( 2021-01-21)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 129, No. 3 ( 2021-01-21)
    Abstract: Multiplexing technologies can be used as a platform for low-cost, high-performance, and large-capacity holographic displays and data storage systems. In this paper, a polarization multiplexed method is proposed to realize two different information channels under orthogonally linear-polarized incidences utilizing the coding metasurface. Based on the modified weighted Gerchberg–Saxton (GSW) algorithm, a two-bit coding metasurface is designed with a set of double-layer cross-type meta-atoms to encode the holographic phase information, which can reflect two independent holographic images with respect to different incident polarization. The experimental results agree well with the numerical simulations and the theoretical predictions, which make the proposed multiplexed two-bit coding meta-hologram a great potential in numerous applications such as data storage and information processing.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/5.0036027
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 7
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    Metasurface with Directional‐Controlled Asymmetric Transmissions
    Wiley ; 2023
    In:  Advanced Photonics Research Vol. 4, No. 5 ( 2023-05)
    Details
    In: Advanced Photonics Research, Wiley, Vol. 4, No. 5 ( 2023-05)
    Abstract: The diverse design freedom and exotic electromagnetic properties of metasurfaces enable them to achieve unprecedented capability and superiority with regard to conventional optical elements. Herein, a bifunctional microwave metasurface with an asymmetric bidirection transmission phase that can be controlled is reported. The proposed metasurface is composed of bilayered double‐arrow‐shaped structures sandwiching a subwavelength metal grating. Such design can achieve not only linear polarization (LP) conversion for two oppositely directed wave incidences but also phase control independently by introducing a rotation and adjusting the geometrical parameters of the double‐arrow‐shaped structures. The metasurface breaks the symmetry and realizes different functions for opposite propagation directions, such as deflection and focusing, orbital angular momentum (OAM) mode generation, and holographic imaging. The experimental results suggest that the proposed Janus metasurface can be further exploited as an attractive platform for various applications ranging from microwave reconfigurable beam antenna and multifunctional polarization control to optical imaging, sensing, and information processing.
    Type of Medium: Online Resource
    ISSN: 2699-9293 , 2699-9293
    URL: Issue
    URL: Article
    DOI: 10.1002/adpr.v4.5
    DOI: 10.1002/adpr.202200359
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 3009932-8
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