1.State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), and Department of Physics, Fudan University, Shanghai 200438, China
2.Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Green Photonics and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
3.Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
4.Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
Qiong He (qionghe@fudan.edu.cn)
Lei Zhou (phzhou@fudan.edu.cn)
纸质出版日期:2020,
网络出版日期:2020-05-06,
收稿日期:2019-12-17,
修回日期:2020-03-26,
录用日期:2020-03-30
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Controlling angular dispersions in optical metasurfaces[J]. LSA, 2020,9(3):739-750.
Zhang, X. Y. et al. Controlling angular dispersions in optical metasurfaces. Light: Science & Applications, 9, 739-750 (2020).
Controlling angular dispersions in optical metasurfaces[J]. LSA, 2020,9(3):739-750. DOI: 10.1038/s41377-020-0313-0.
Zhang, X. Y. et al. Controlling angular dispersions in optical metasurfaces. Light: Science & Applications, 9, 739-750 (2020). DOI: 10.1038/s41377-020-0313-0.
Although metasurfaces have shown great potential for manipulating li
ght
most previously realized meta-devices suffer from
uncontrolled
angular dispersions
making them unfavorable for many applications. Here
we propose a general strategy to realize optical metasurfaces with desired angular dispersions based on carefully controlling both the near-field couplings between meta-atoms and the radiation pattern of a single meta-atom. Utilizing such a strategy
we experimentally demonstrate a series of optical meta-devices with predesigned angular dispersions
including two incident-angle-
insensitive
absorbers
one incident-angle-
selective
absorber
and one multifunctional meta-polarizer whose functionality changes from a perfect mirror to a half-waveplate as the excitation angle varies. Finally
we design a
gradient
meta-device using meta-atom arrays with purposely controlled angular dispersions and numerically demonstrate that it can exhibit distinct wavefront-control functionalities when illuminated at different incident angles. Our findings establish a new platform for achieving angle-multiplexed functional meta-devices
significantly expanding the wave-manipulation capabilities of optical metasurfaces.
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