Broadband decoupling of intensity and polarization with vectorial Fourier metasurfaces.
Broadband decoupling of intensity and polarization with vectorial Fourier metasurfaces.
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利用矢量傅里叶变换面实现光强和偏振的宽带解耦。
DOI:
10.1038/s41467-021-23908-0
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发表时间:
2021-06-15
影响因子:
16.6
通讯作者:
Genevet P
中科院分区:
文献类型:
--
作者:
Song Q;Baroni A;Wu PC;Chenot S;Brandli V;Vézian S;Damilano B;de Mierry P;Khadir S;Ferrand P;Genevet P
Intensity and polarization are two fundamental components of light. Independent control of them is of tremendous interest in many applications. In this paper, we propose a general vectorial encryption method, which enables arbitrary far-field light distribution with the local polarization, including orientations and ellipticities, decoupling intensity from polarization across a broad bandwidth using geometric phase metasurfaces. By revamping the well-known iterative Fourier transform algorithm, we propose “à la carte” design of far-field intensity and polarization distribution with vectorial Fourier metasurfaces. A series of non-conventional vectorial field distribution, mimicking cylindrical vector beams in the sense that they share the same intensity profile but with different polarization distribution and a speckled phase distribution, is demonstrated. Vectorial Fourier optical metasurfaces may enable important applications in the area of complex light beam generation, secure optical data storage, steganography and optical communications. Though multiplexing meta-holograms remains an attractive approach for realizing optical encoding, existing methods encode information based on the intensity of the holographic images. Here, the authors report vectorial metasurfaces that decouple and encode intensity and polarization information.
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