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Broadband decoupling of intensity and polarization with vectorial Fourier metasurfaces

Abstract : Intensity and polarization are two fundamental components of light. Independently 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.
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Contributor : Patrick Ferrand Connect in order to contact the contributor
Submitted on : Wednesday, June 16, 2021 - 8:07:05 AM
Last modification on : Thursday, August 4, 2022 - 5:05:52 PM


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Qinghua Song, Arthur Baroni, Pin Chieh Wu, Sébastien Chenot, Virginie Brandli, et al.. Broadband decoupling of intensity and polarization with vectorial Fourier metasurfaces. Nature Communications, 2021, 12, pp.3631. ⟨10.1038/s41467-021-23908-0⟩. ⟨hal-03111022v2⟩



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