Controlling the Colour of Metals: Intaglio and Bas-Relief Metamaterials
Jianfa Zhang,Yifang Chen,Nikolay I. Zheludev,Kevin F. MacDonald,Jun-Yu Ou,Nikitas Papasimakis +5 more
TLDR
This work shows that periodic structuring of a metal film without violation of continuity (i.e. without perforation) is sufficient to achieve substantial modification of reflectivity in the optical part of the spectrum.Abstract:
The fabrication of indented ('intaglio') or raised ('bas-relief') sub-wavelength metamaterial patterns on a metal surface provides a mechanism for changing and controlling the colour of the metal without employing any form of chemical surface modification, thin-film coating or diffraction effects. We show that a broad range of colours can be achieved by varying the structural parameters of metamaterial designs to tune absorption resonances. This novel approach to the 'structural colouring' of pure metals offers great versatility and scalability for both aesthetic (e.g. jewellery design) and functional (e.g. sensors, optical modulators) applications. We focus here on visible colour but the concept can equally be applied to the engineering of metallic spectral response in other electromagnetic domains.read more
Citations
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Nanometre optical coatings based on strong interference effects in highly absorbing media
TL;DR: It is shown that under appropriate conditions interference can instead persist in ultrathin, highly absorbing films of a few to tens of nanometres in thickness, and a new type of optical coating comprising such a film on a metallic substrate, which selectively absorbs various frequency ranges of the incident light is demonstrated.
Journal ArticleDOI
Plasmonic colour generation
Anders Kristensen,Joel K. W. Yang,Sergey I. Bozhevolnyi,Stephan Link,Peter Nordlander,Naomi J. Halas,N. Asger Mortensen +6 more
TL;DR: Plasmonic colours are structural colors that emerge from resonant interactions between light and metallic nanostructures as mentioned in this paper, which can be used to colour large surfaces, can be mass-produced and dynamically reconfigured, and can provide sub-diffraction resolution.
Journal ArticleDOI
Plasmonic Color Palettes for Photorealistic Printing with Aluminum Nanostructures
Shawn J. Tan,Lei Zhang,Di Zhu,Xiao Ming Goh,Ying Min Wang,Karthik Kumar,Cheng-Wei Qiu,Joel K. W. Yang +7 more
TL;DR: This work expands the visible color space through spatially mixing and adjusting the nanoscale spacing of discrete nanostructures to pave the way toward a new generation of low-cost, high-resolution, plasmonic color printing with direct applications in security tagging, cryptography, and information storage.
Journal ArticleDOI
Large-area, Lithography-free super absorbers and color filters at visible frequencies using ultrathin metallic films
TL;DR: In this paper, a resonant optical filter design based on a modified, asymmetric metal was proposed to overcome the difficulties associated with the nanofabrication using a lithography-free approach.
Journal ArticleDOI
Polarization-independent actively tunable colour generation on imprinted plasmonic surfaces.
Daniel Franklin,Yuan Chen,Abraham Vázquez-Guardado,Sushrut Modak,Javaneh Boroumand,Daming Xu,Shin-Tson Wu,Debashis Chanda +7 more
TL;DR: A tunable polarization-independent reflective surface where the colour of the surface is changed as a function of applied voltage is demonstrated, paving the way towards dynamic pixels for reflective displays.
References
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