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Proceedings Paper

Self-assembled glass-based Fano resonant metasurfaces
Author(s): L. Martin-Monier; T. Das Gupta; W. Yan; T. D. Nguyen; A. Page; F. Sorin
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Paper Abstract

Dielectric metasurfaces require the integration of large index contrast materials with accurate control over position and size for high optical efficiency. Their fabrication usually relies on well-established lithographic techniques. While lithography bears considerable advantages in terms of reproducibility and accuracy, it remains a time and cost intensive process that remains restricted in terms of materials, and difficult to scale up to large-area and non-rigid substrates. Chalcogenide glasses constitute a class of materials particularly suited for metasurfaces, thanks to their low intrinsic losses coupled with their tunable high refractive indices. The challenges associated with the nanostructuring of glassy materials has however limited their use in nanophotonics. Here, we rely on the glass characteristic viscous properties and destabilizing Van der Waals interactions, to show the rearrangement of thin chalcogenide films into well-ordered and defect free structures at the nanoscale. In particular, we show the fabrication of arrays of a variety of chalcogenides nano-objects, both continuous and isolated, with a variety of sizes and structures, and on different, rigid, flexible and stretchable substrates. Such controlled large area arrays are shown to have strong field enhancement leading to Fano resonances, which finds applications as biosensor and second harmonic generation.

Paper Details

Date Published: 28 February 2020
PDF: 8 pages
Proc. SPIE 11292, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIII, 112920D (28 February 2020); doi: 10.1117/12.2546112
Show Author Affiliations
L. Martin-Monier, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
T. Das Gupta, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
W. Yan, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
T. D. Nguyen, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
A. Page, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
F. Sorin, Ecole Polytechnique Fédérale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 11292:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIII
Georg von Freymann; Eva Blasco; Debashis Chanda, Editor(s)

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