Broadband decoupling of intensity and polarization with vectorial Fourier metasurfaces

Qinghua Song, Arthur Baroni, Pin Chieh Wu, Sébastien Chenot, Virginie Brandli, Stéphane Vézian, Benjamin Damilano, Philippe Mierry, Samira Khadir, Patrick Ferrand and Patrice Genevet ()
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Qinghua Song: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Arthur Baroni: Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel
Pin Chieh Wu: National Cheng Kung University
Sébastien Chenot: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Virginie Brandli: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Stéphane Vézian: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Benjamin Damilano: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Philippe Mierry: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Samira Khadir: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis
Patrick Ferrand: Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel
Patrice Genevet: Université Côte d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract 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.

Date: 2021
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DOI: 10.1038/s41467-021-23908-0

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