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Catalytic Metasurfaces Empowered by Bound States in the Continuum

[Image: see text] Photocatalytic platforms based on ultrathin reactive materials facilitate carrier transport and extraction but are typically restricted to a narrow set of materials and spectral operating ranges due to limited absorption and poor energy-tuning possibilities. Metasurfaces, a class o...

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Autores principales: Hu, Haiyang, Weber, Thomas, Bienek, Oliver, Wester, Alwin, Hüttenhofer, Ludwig, Sharp, Ian D., Maier, Stefan A., Tittl, Andreas, Cortés, Emiliano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9413421/
https://www.ncbi.nlm.nih.gov/pubmed/35953078
http://dx.doi.org/10.1021/acsnano.2c05680
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author Hu, Haiyang
Weber, Thomas
Bienek, Oliver
Wester, Alwin
Hüttenhofer, Ludwig
Sharp, Ian D.
Maier, Stefan A.
Tittl, Andreas
Cortés, Emiliano
author_facet Hu, Haiyang
Weber, Thomas
Bienek, Oliver
Wester, Alwin
Hüttenhofer, Ludwig
Sharp, Ian D.
Maier, Stefan A.
Tittl, Andreas
Cortés, Emiliano
author_sort Hu, Haiyang
collection PubMed
description [Image: see text] Photocatalytic platforms based on ultrathin reactive materials facilitate carrier transport and extraction but are typically restricted to a narrow set of materials and spectral operating ranges due to limited absorption and poor energy-tuning possibilities. Metasurfaces, a class of 2D artificial materials based on the electromagnetic design of nanophotonic resonators, allow optical absorption engineering for a wide range of materials. Moreover, tailored resonances in nanostructured materials enable strong absorption enhancement and thus carrier multiplication. Here, we develop an ultrathin catalytic metasurface platform that leverages the combination of loss-engineered substoichiometric titanium oxide (TiO(2–x)) and the emerging physical concept of optical bound states in the continuum (BICs) to boost photocatalytic activity and provide broad spectral tunability. We demonstrate that our platform reaches the condition of critical light coupling in a TiO(2–x) BIC metasurface, thus providing a general framework for maximizing light–matter interactions in diverse photocatalytic materials. This approach can avoid the long-standing drawbacks of many naturally occurring semiconductor-based ultrathin films applied in photocatalysis, such as poor spectral tunability and limited absorption manipulation. Our results are broadly applicable to fields beyond photocatalysis, including photovoltaics and photodetectors.
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spelling pubmed-94134212022-08-27 Catalytic Metasurfaces Empowered by Bound States in the Continuum Hu, Haiyang Weber, Thomas Bienek, Oliver Wester, Alwin Hüttenhofer, Ludwig Sharp, Ian D. Maier, Stefan A. Tittl, Andreas Cortés, Emiliano ACS Nano [Image: see text] Photocatalytic platforms based on ultrathin reactive materials facilitate carrier transport and extraction but are typically restricted to a narrow set of materials and spectral operating ranges due to limited absorption and poor energy-tuning possibilities. Metasurfaces, a class of 2D artificial materials based on the electromagnetic design of nanophotonic resonators, allow optical absorption engineering for a wide range of materials. Moreover, tailored resonances in nanostructured materials enable strong absorption enhancement and thus carrier multiplication. Here, we develop an ultrathin catalytic metasurface platform that leverages the combination of loss-engineered substoichiometric titanium oxide (TiO(2–x)) and the emerging physical concept of optical bound states in the continuum (BICs) to boost photocatalytic activity and provide broad spectral tunability. We demonstrate that our platform reaches the condition of critical light coupling in a TiO(2–x) BIC metasurface, thus providing a general framework for maximizing light–matter interactions in diverse photocatalytic materials. This approach can avoid the long-standing drawbacks of many naturally occurring semiconductor-based ultrathin films applied in photocatalysis, such as poor spectral tunability and limited absorption manipulation. Our results are broadly applicable to fields beyond photocatalysis, including photovoltaics and photodetectors. American Chemical Society 2022-08-11 2022-08-23 /pmc/articles/PMC9413421/ /pubmed/35953078 http://dx.doi.org/10.1021/acsnano.2c05680 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Hu, Haiyang
Weber, Thomas
Bienek, Oliver
Wester, Alwin
Hüttenhofer, Ludwig
Sharp, Ian D.
Maier, Stefan A.
Tittl, Andreas
Cortés, Emiliano
Catalytic Metasurfaces Empowered by Bound States in the Continuum
title Catalytic Metasurfaces Empowered by Bound States in the Continuum
title_full Catalytic Metasurfaces Empowered by Bound States in the Continuum
title_fullStr Catalytic Metasurfaces Empowered by Bound States in the Continuum
title_full_unstemmed Catalytic Metasurfaces Empowered by Bound States in the Continuum
title_short Catalytic Metasurfaces Empowered by Bound States in the Continuum
title_sort catalytic metasurfaces empowered by bound states in the continuum
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9413421/
https://www.ncbi.nlm.nih.gov/pubmed/35953078
http://dx.doi.org/10.1021/acsnano.2c05680
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