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Planar refractive index patterning through microcontact photo-thermal annealing of a printable organic/inorganic hybrid material

S. Bachevilliera, H.-K. Yuanb, K. Tetznerc, D.D.C. Bradleyd, T.D. Anthopoulosd, P.N. Stavrinoue and N. Stingelinf

Published in:

Mater. Horiz., vol. 9, no. 1, pp. 411-416 (2022).


We demonstrate proof-of-concept refractive-index structures with large refractive-index-gradient profiles, using a micro-contact photothermal annealing (µCPA) process to pattern organic/inorganic hybrid materials comprising titanium oxide hydrate within a poly(vinyl alcohol) binder. A significant refractive index modulation of up to Δn ≈ +0.05 can be achieved with µCPA within less than a second of pulsed lamp exposure, which promises the potential for a high throughput fabrication process of photonic structures with a polymer-based system.

a Department of Materials and Centre for Plastic Electronics, Imperial College London, Exhibition Rd, London, UK
b Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, Prince Consort Rd, London, UK
c Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
d Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
e Department of Engineering Science, University of Oxford, Parks Rd, Oxford OX1 3PJ, UK
f School of Materials Science & Engineering and School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Ferst Drive, Atlanta, GA 300332, USA

Copyright © Royal Society of Chemistry 2022.

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