Alvarez Fernandez, A;
Aissou, K;
Pécastaings, G;
Hadziioannou, G;
Fleury, G;
Ponsinet, V;
(2018)
High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films.
Nanoscale Advances
, 1
pp. 849-857.
10.1039/C8NA00239H.
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Abstract
Materials with a high and tunable refractive index are attractive for nanophotonic applications. In this contribution, we propose a straightforward fabrication technique of high-refractive index surfaces based on self-assembled nanostructured block copolymer thin films. The selective and customizable metal incorporation within out-of-plane polymer lamellae produces azimuthally isotropic metallic nanostructures of defined geometries, which were analysed using microscopy and small-angle X-ray scattering techniques. Variable-angle spectroscopic ellipsometry was used to relate the geometrical parameters of the metallic features and the resulting refractive index of the patterned surfaces. In particular, nanostructured gold patterns with a high degree of homogeneity and a gold content as low as 16 vol% reach a refractive index value of more than 3 in the visible domain. Our study thus demonstrates a new route for the preparation of high refractive index surfaces with a low metal content for optical applications.
| Type: | Article |
|---|---|
| Title: | High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/C8NA00239H |
| Publisher version: | http://doi.org/10.1039/C8NA00239H |
| Language: | English |
| Additional information: | © Royal Society of Chemistry 2018. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10064491 |
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