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Flat Helical Nanosieves

机译:平面螺旋纳米筛

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摘要

Compact and miniaturized devices with flexible functionalities are always highly demanded in optical integrated systems. Plasmonic nanosieve has been successfully harnessed as an ultrathin flat platform for complex manipulation of light, including holography, vortex generation, and nonlinear processes. Compared with most of the reported single-functional devices, multifunctional nanosieves might find more complex and novel applications across nanophotonics, optics, and nanotechnology. Here, a promising roadmap for nanosieve-based helical devices is experimentally demonstrated, which achieves full manipulations of optical vortices, including its generation, hybridization, spatial multiplexing, focusing and nondiffraction propagation, etc., by controlling the geometric phase of spin light via over 121 thousands of spatially rotated nanosieves. Thanks to such spin-conversion nanosieve helical elements, it is no longer necessary to employ the conventional two-beam interferometric measurement to characterize optical vortices, while the interference can be realized natively without changing any parts of the current setup. The proposed strategy makes the far-field manipulations of optical orbital angular momentum within an ultrathin interface viable and bridges singular optics and integrated optics. In addition, it enables more unique extensibility and flexibility in versatile optical elements than traditional phase-accumulated helical optical devices.
机译:在光学集成系统中,对具有灵活功能的紧凑型和小型化设备的需求一直很高。等离子体纳米筛已成功地用作超薄平面平台,用于复杂的光处理,包括全息,涡旋产生和非线性过程。与大多数报道的单功能设备相比,多功能纳米筛可能在纳米光子学,光学和纳米技术中找到更复杂和新颖的应用。在此,通过实验证明了基于纳米筛的螺旋装置的前景广阔的路线图,该路线图可通过控制自旋光的几何相位来实现对光学涡旋的完整控制,包括其产生,杂交,空间多路复用,聚焦和无衍射传播等。 12.1万个空间旋转的纳米筛。由于这种自旋转换纳米筛螺旋元件,不再需要使用常规的两束干涉测量来表征光学涡旋,而干扰可以在不改变当前设置任何部分的情况下自然实现。所提出的策略使得在超薄界面内进行光学轨道角动量的远场操作成为可能,并桥接了奇异光学器件和集成光学器件。此外,与传统的相位累积型螺旋形光学器件相比,它在通用光学元件中实现了更多独特的可扩展性和灵活性。

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  • 来源
    《Advanced Functional Materials》 |2016年第29期|5255-5262|共8页
  • 作者单位

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore|Natl Univ Singapore, Grad Sch Integrat Sci & Engn, Ctr Life Sci CeLS, 05-01,28 Med Dr, Singapore 117456, Singapore;

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore|Informat Technol Univ, 346-B Ferozepur Rd, Lahore 54600, Pakistan;

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore;

    ASTAR, Inst Mat Res & Engn, 08-03,2 Fusionopolis Way, Singapore 138634, Singapore;

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore|Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China;

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore;

    ASTAR, Inst Mat Res & Engn, 08-03,2 Fusionopolis Way, Singapore 138634, Singapore;

    ASTAR, Inst Mat Res & Engn, 08-03,2 Fusionopolis Way, Singapore 138634, Singapore;

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore;

    Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore|Natl Univ Singapore, Grad Sch Integrat Sci & Engn, Ctr Life Sci CeLS, 05-01,28 Med Dr, Singapore 117456, Singapore;

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