Photonic Multitasking Interleaved Si Nanoantenna Phased Array
Photonic Multitasking Interleaved Si Nanoantenna Phased Array
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DOI：
10.1021/acs.nanolett.6b03505
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发表时间：
2016-12-01
期刊：
影响因子：
10.8
通讯作者：
Brongersma, Mark L.
中科院分区：
文献类型：
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作者：
Lin, Dianmin;Holsteen, Aaron L.;Brongersma, Mark L.
超表面提供了前所未有的控制光传播通过赋予局部，空间变化的相位变化在入射电磁波。它们可以提高传统光学元件的性能，并促进具有新功能和外形因素的光学元件的创建。在这里，我们基于共享孔径相控阵天线和基于si的梯度超表面的知识来实现各种多功能超表面，这些超表面能够在单个表面区域内实现多种不同的功能。作为重点，我们证明了可以在不减小每个子元件孔径的情况下实现多个光学元件的交错。实现了基于硅基梯度超表面构造的多功能光学元件，包括轴向和横向多焦几何相位超表面透镜。我们进一步展示了具有高空间分辨率的多波长彩色成像。最后，利用多功能超表面获得了同时分色的光学成像功能，为先进成像和显示领域开辟了新的机遇。
Metasurfaces provide unprecedented control over light propagation by imparting local, space-variant phase changes on an incident electromagnetic wave. They can improve the performance of conventional optical elements and facilitate the creation of optical components with new functionalities and form factors. Here, we build on knowledge from shared aperture phased array antennas and Si-based gradient metasurfaces to realize various multifunctional metasurfaces capable of achieving multiple distinct functions within a single surface region. As a key point, we demonstrate that interleaving multiple optical elements can be accomplished without reducing the aperture of each subelement. Multifunctional optical elements constructed from Si-based gradient metasurface are realized, including axial and lateral multifocus geometric phase metasurface lenses. We further demonstrate multiwavelength color imaging with a high spatial resolution. Finally, optical imaging functionality with simultaneous color separation has been obtained by using multifunctional metasurfaces, which opens up new opportunities for the field of advanced imaging and display.