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Scalable, ultra-resistant structural colors based on network metamaterials
journal contribution
posted on 2023-06-09, 07:33 authored by Henning Galinski, Gael Favraud, Hao Dong, Juan Sebastian Totero Gongora, Favaro Gregory, Max Döbeli, Ralph Spolenak, Andrea Fratalocchi, Federico CapassoStructural colors have drawn wide attention for their potential as a future printing technology for various applications, ranging from biomimetic tissues to adaptive camouflage materials. However, an efficient approach to realize robust colors with a scalable fabrication technique is still lacking, hampering the realization of practical applications with this platform. Here, we develop a new approach based on large-scale network metamaterials that combine dealloyed subwavelength structures at the nanoscale with lossless, ultra-thin dielectric coatings. By using theory and experiments, we show how subwavelength dielectric coatings control a mechanism of resonant light coupling with epsilon-near-zero regions generated in the metallic network, generating the formation of saturated structural colors that cover a wide portion of the spectrum. Ellipsometry measurements support the efficient observation of these colors, even at angles of 70°. The network-like architecture of these nanomaterials allows for high mechanical resistance, which is quantified in a series of nano-scratch tests. With such remarkable properties, these metastructures represent a robust design technology for real-world, large-scale commercial applications.
History
Publication status
- Published
File Version
- Published version
Journal
Light: Science and ApplicationsISSN
2095-5545Publisher
Nature Publishing GroupExternal DOI
Issue
6Volume
2017Article number
e16233Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-11-15First Open Access (FOA) Date
2017-11-15First Compliant Deposit (FCD) Date
2017-11-15Usage metrics
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