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    Dual non-diffractive terahertz beam generators based on all-dielectric metasurface

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    FOE-20098-LC.pdf
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    Description:
    Accepted manuscript
    Embargo End Date:
    2021-12-23
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    Description:
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    Embargo End Date:
    2021-12-23
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    Type
    Article
    Authors
    Liu, Chunyu
    Li, Yanfeng
    Feng, Xi
    Zhang, Xixiang cc
    Han, Jiaguang
    Zhang, Weili
    KAUST Department
    Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-2016-CRG5-2950
    Date
    2020-12-23
    Embargo End Date
    2021-12-23
    Submitted Date
    2020-09-05
    Permanent link to this record
    http://hdl.handle.net/10754/667049
    
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    Abstract
    The applications of terahertz (THz) technology can be greatly extended using non-diffractive beams with unique field distributions and non-diffractive transmission characteristics. Here, we design and experimentally demonstrate a set of dual non-diffractive THz beam generators based on an all-dielectric metasurface. Two kinds of non-diffractive beams with dramatically opposite focusing properties, Bessel beam and abruptly autofocusing (AAF) beam, are considered. A Bessel beam with longdistance non-diffractive characteristics and an AAF beam with low energy during transmission and abruptly increased energy near the focus are generated for x- and y-polarized incident waves, respectively. These two kinds of beams are characterized and the results agree well with simulations. In addition, we show numerically that these two kinds of beams can also carry orbital angular momentum by further imposing proper angular phases in the design. We believe that these metasurface-based beam generators have great potential use in THz imaging, communications, non-destructive evaluation, and many other fields. [Figure not available: see fulltext.].
    Citation
    Liu, C., Li, Y., Feng, X., Zhang, X., Han, J., & Zhang, W. (2020). Dual non-diffractive terahertz beam generators based on all-dielectric metasurface. Frontiers of Optoelectronics. doi:10.1007/s12200-020-1098-8
    Sponsors
    This work was funded by the National Key Research and Development Program of China (No. 2017YFA0701004), the National Natural Science Foundation of China (Grant Nos. 61935015, 61875150, 61605143, 61735012, 61722509, and 61871212), Tianjin Municipal Fund for Distinguished Young Scholars (No. 18JCJQJC45600), and King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (No. OSR-2016-CRG5-2950).
    Publisher
    Springer Science and Business Media LLC
    Journal
    Frontiers of Optoelectronics
    DOI
    10.1007/s12200-020-1098-8
    Additional Links
    http://link.springer.com/10.1007/s12200-020-1098-8
    ae974a485f413a2113503eed53cd6c53
    10.1007/s12200-020-1098-8
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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