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Chirality‐Assisted High‐Efficiency Metasurfaces with Independent Control of Phase, Amplitude, and Polarization
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-12-09 , DOI: 10.1002/adom.201801479 He‐Xiu Xu 1, 2, 3 , Guangwei Hu 2 , Lei Han 2, 4 , Menghua Jiang 2 , Yongjun Huang 5 , Ying Li 2 , Xinmi Yang 6 , Xiaohui Ling 3 , Liezun Chen 3 , Jianlin Zhao 4 , Cheng‐Wei Qiu 2
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-12-09 , DOI: 10.1002/adom.201801479 He‐Xiu Xu 1, 2, 3 , Guangwei Hu 2 , Lei Han 2, 4 , Menghua Jiang 2 , Yongjun Huang 5 , Ying Li 2 , Xinmi Yang 6 , Xiaohui Ling 3 , Liezun Chen 3 , Jianlin Zhao 4 , Cheng‐Wei Qiu 2
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Simultaneously independent control of phase, amplitude, and polarization is pivotal yet challenging for manipulating electromagnetic waves by transmissive metasurfaces. Huygens' metasurface affords a high‐efficiency recipe primarily by engineering phase‐only meta‐atoms, restricting itself from realizing unprecedentedly complex functions of the transmission beam. Here, a 3D chirality‐assisted metasurface concept relying on integrated magnetoelectric meta‐atoms is proposed. It empowers the completely decoupled and arbitrary control of phase and amplitude at large incident angles and arbitrary polarizations. This strategy thus facilitates very sophisticated beam manipulations at close‐to‐unity cross‐polarized efficiency via trilayer integrated resonators with mutual twist. The prescribed phase coverage can be determined by geometrical footprints of the unit cell, while the global azimuthal twist unlocks the capability of tuning amplitudes without affecting the phase. The concept and significance of it are validated to implement several proof‐of‐prototype demanding functionalities by thin metasurfaces of λo/12, which generate self‐accelerating diffraction‐free Airy beams, lateral and axial dual focusing, and even specific multiplexed beam shaping, respectively. This finding opens up an alternative way in very fine control of light with minimalist complexity and advanced performance. It can stimulate novel and high‐performance versatile photonic metadevices, thanks to the fully independent control of phase, amplitude, and polarization.
中文翻译：
手性辅助的高效超颖表面，具有相位，振幅和极化的独立控制
相位，幅度和极化的同时独立控制对于通过透射形超表面操纵电磁波至关重要，但具有挑战性。惠更斯的超颖表面主要通过仅工程化阶段的超原子提供了高效配方，从而限制了自己实现传输束空前复杂的功能。在此，提出了一种基于集成磁电亚原子的3D手性辅助超表面概念。它允许在大入射角和任意极化下完全解耦和任意控制相位和幅度。因此，这种策略通过具有相互扭曲的三层集成谐振器，以接近于统一的交叉极化效率，促进了非常复杂的光束操纵。规定的相位覆盖范围可以通过单位晶格的几何尺寸来确定，而整体方位角扭曲则可以在不影响相位的情况下调整幅度。验证了其概念和重要性，从而可以通过λ的较细亚表面实现多种原型验证要求的功能o / 12，分别产生自加速的无衍射艾里光束，横向和轴向双重聚焦，甚至特定的复用光束整形。这一发现为光的精细控制开辟了另一种途径，具有最小的复杂性和先进的性能。由于完全独立地控制相位，幅度和偏振，它可以激发新颖而高性能的多功能光子元设备。
更新日期：2018-12-09
中文翻译：
手性辅助的高效超颖表面，具有相位，振幅和极化的独立控制
相位，幅度和极化的同时独立控制对于通过透射形超表面操纵电磁波至关重要，但具有挑战性。惠更斯的超颖表面主要通过仅工程化阶段的超原子提供了高效配方，从而限制了自己实现传输束空前复杂的功能。在此，提出了一种基于集成磁电亚原子的3D手性辅助超表面概念。它允许在大入射角和任意极化下完全解耦和任意控制相位和幅度。因此，这种策略通过具有相互扭曲的三层集成谐振器，以接近于统一的交叉极化效率，促进了非常复杂的光束操纵。规定的相位覆盖范围可以通过单位晶格的几何尺寸来确定，而整体方位角扭曲则可以在不影响相位的情况下调整幅度。验证了其概念和重要性，从而可以通过λ的较细亚表面实现多种原型验证要求的功能o / 12，分别产生自加速的无衍射艾里光束，横向和轴向双重聚焦，甚至特定的复用光束整形。这一发现为光的精细控制开辟了另一种途径，具有最小的复杂性和先进的性能。由于完全独立地控制相位，幅度和偏振，它可以激发新颖而高性能的多功能光子元设备。
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