Color Tunable, Lithography-Free Refractory Metal-Oxide Metacoatings with a Graded Refractive Index Profile.

Autor:	Perkins J; Nanoscale Optics Lab, Department of Electrical and Computer Engineering, University of Alberta, T6G 2R3, Edmonton, Canada., Cheng H; Nanoscale Optics Lab, Department of Electrical and Computer Engineering, University of Alberta, T6G 2R3, Edmonton, Canada., Craig C; Optoelectronics Research Centre (ORC), University of Southampton, Southampton SO17 1BJ, U.K., Hewak DW; Optoelectronics Research Centre (ORC), University of Southampton, Southampton SO17 1BJ, U.K., Gholipour B; Nanoscale Optics Lab, Department of Electrical and Computer Engineering, University of Alberta, T6G 2R3, Edmonton, Canada.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2023 Apr 12; Vol. 23 (7), pp. 2601-2606. Date of Electronic Publication: 2023 Mar 30.
DOI:	10.1021/acs.nanolett.2c04867
Abstrakt:	The refractory metal-oxide semiconductors are an overlooked platform for nanophononics that offer alloys with high melting points and tunable optical constants through stoichiometry changes and ion intercalation. We show that these semiconductors can form metamaterial coatings (metacoatings) made from a set of highly subwavelength, periodic metal-oxide layers (≤20 nm) with a varying and graded refractive index profile that includes a combination of high and low refractive indices and plasmonic layers. These metacoatings exhibit vibrant, structural color arising from the periodic index profile that can be tuned across the visible spectrum, over ultralarge lateral areas through bottom-up thermal annealing techniques.
Databáze:	MEDLINE
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