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Spin-Controlled Integrated Near- and Far-Field Optical Launcher

机译：自旋控制的集成近场和远场光学发射器

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摘要

With the evergrowing demand for miniaturization of photonic devices, the integration of different functionalities in a single module is highly desired for the next generation of ultracompact photonic devices. Optical modules based on the near field and scattered far field are both key elements in the construction of nanophotonic devices. However, integrating the near- and far-field functionalities into a single module is a great challenge, which hinders the integration and minimization of optical devices. Here, a bifunctional integrated near- and far-field optical launcher with a single metasurface structure is theoretically proposed and experimentally demonstrated, where the unidirectional launching of surface plasmon polaritons (SPPs) and the focusing of scattered far fields can be simultaneously achieved. Moreover, the SPP propagating direction and the real/virtual focus of the far-field scattering can be actively controlled by the spin state of the incident light. With the additional degree of freedom provided by the positions of the metasurface elements, the optical performances of this bifunctional structure can be compared to the one with single functionality. The work provides a new platform for the integration and control of different optical components at subwavelength scale, and opens a way to design multifunctional optical devices for the future.
机译：随着对光子器件小型化的不断增长的需求，下一代超紧凑型光子器件迫切需要将不同功能集成在单个模块中。基于近场和散射远场的光学模块都是构建纳米光子器件的关键要素。然而，将近场和远场功能集成到单个模块中是一个巨大的挑战，这阻碍了光学设备的集成和最小化。在此，从理论上提出并通过实验证明了具有单一超表面结构的双功能集成近场和远场光学发射器，其中可以同时实现表面等离子体激元极化子（SPPs）的单向发射和散射远场的聚焦。而且，可以通过入射光的自旋状态来主动地控制SPP的传播方向和远场散射的真实/虚拟焦点。通过由超表面元件的位置提供的附加自由度，可以将该双功能结构的光学性能与具有单个功能的光学功能进行比较。这项工作为亚波长规模的不同光学组件的集成和控制提供了一个新的平台，并为未来设计多功能光学设备开辟了道路。

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  • 来源
    《Advanced Functional Materials》 |2018年第8期|1705503.1-1705503.6|共6页
  • 作者

    Jiang Qiao; Bao Yanjun; Lin Feng; Zhu Xing; Zhang Shuang; Fang Zheyu;

  • 作者单位

    Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China;

    Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China;

    Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China;

    Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China;

    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England;

    Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    integrated devices; metalens; metasurface; surface plasmons;

    机译：集成器件;金属;表面;表面等离子体;

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