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    Broadband non-polarizing terahertz beam splitters with variable split ratio

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    Type
    Article
    Authors
    Wei, Minggui
    Xu, Quan
    Wang, Qiu
    Zhang, Xueqian
    Li, Yanfeng cc
    Gu, Jianqiang cc
    Tian, Zhen
    Zhang, Xixiang cc
    Han, Jiaguang cc
    Zhang, Weili
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-08-15
    Online Publication Date
    2017-08-15
    Print Publication Date
    2017-08-14
    Permanent link to this record
    http://hdl.handle.net/10754/625360
    
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    Abstract
    Seeking effective terahertz functional devices has always aroused extensive attention. Of particular interest is the terahertz beam splitter. Here, we have proposed, designed, manufactured, and tested a broadband non-polarizing terahertz beam splitter with a variable split ratio based on an all-dielectric metasurface. The metasurface was created by patterning a dielectric surface of the N-step phase gradient and etching to a few hundred micrometers. The conversion efficiency as high as 81% under the normal incidence at 0.7 THz was achieved. Meanwhile, such a splitter works well over a broad frequency range. The split ratio of the proposed design can be continuously tuned by simply shifting the metasurface, and the angle of emergences can also be easily adjusted by choosing the step of phase gradients. The proposed design is non-polarizing, and its performance is kept under different polarizations.
    Citation
    Wei M, Xu Q, Wang Q, Zhang X, Li Y, et al. (2017) Broadband non-polarizing terahertz beam splitters with variable split ratio. Applied Physics Letters 111: 071101. Available: http://dx.doi.org/10.1063/1.4986538.
    Sponsors
    This work was supported by the National Key Basic Research Program of China (Grant No. 2014CB339800), the National Science Foundation of China (Grant Nos. 61422509, 61420106006, and 61427814), and the U.S. National Science Foundation (Grant No. ECCS-1232081).
    Publisher
    AIP Publishing
    Journal
    Applied Physics Letters
    DOI
    10.1063/1.4986538
    Additional Links
    http://aip.scitation.org/doi/10.1063/1.4986538
    ae974a485f413a2113503eed53cd6c53
    10.1063/1.4986538
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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