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Article

Mid-Infrared Grayscale Metasurface Holograms

1
School of Science, Nanjing University of Science and Technology, Nanjing 210094, China
2
CINTRA, Nanyang Technological University, Singapore 637553, Singapore
3
Université Côte d’Azur, CNRS, CRHEA, rue Bernard Gregory, Sophia Antipolis, 06560 Valbonne, France
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(2), 552; https://doi.org/10.3390/app10020552
Received: 19 December 2019 / Revised: 8 January 2020 / Accepted: 9 January 2020 / Published: 11 January 2020
(This article belongs to the Section Optics and Lasers)
Optical metasurfaces composed of two-dimensional arrays of densely packed nanostructures can project arbitrary holographic images at mid-infrared frequency. Our approach employs silicon nanopillars to control light properties, including polarization-independent phase response working with high-transmission efficiency over the 2π-phase modulation range at wavelength 4.7 μm. We experimentally dispose nanopillars accordingly to phase-only profiles calculated using the conventional Gerchberg–Saxton algorithm and revealed the optical performances of our devices using a mid-infrared on-axis optical setup. The total efficiency of our reflection hologram reaches 81%. Our experimental results agree well with the image of the desired object, opening up new perspectives for mid-infrared imaging and displaying for military, life science and sensing application. View Full-Text
Keywords: metasurfaces; hologram; mid-infrared optics metasurfaces; hologram; mid-infrared optics
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MDPI and ACS Style

Wu, K.; Kossowski, N.; Qiu, H.; Wang, H.; Wang, Q.; Genevet, P. Mid-Infrared Grayscale Metasurface Holograms. Appl. Sci. 2020, 10, 552. https://doi.org/10.3390/app10020552

AMA Style

Wu K, Kossowski N, Qiu H, Wang H, Wang Q, Genevet P. Mid-Infrared Grayscale Metasurface Holograms. Applied Sciences. 2020; 10(2):552. https://doi.org/10.3390/app10020552

Chicago/Turabian Style

Wu, Kedi, Nicolas Kossowski, Haodong Qiu, Hong Wang, Qijie Wang, and Patrice Genevet. 2020. "Mid-Infrared Grayscale Metasurface Holograms" Applied Sciences 10, no. 2: 552. https://doi.org/10.3390/app10020552

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