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Radial bound states in the continuum for polarization-invariant nanophotonics

All-dielectric nanophotonics underpinned by the physics of bound states in the continuum (BICs) have demonstrated breakthrough applications in nanoscale light manipulation, frequency conversion and optical sensing. Leading BIC implementations range from isolated nanoantennas with localized electroma...

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Autores principales: Kühner, Lucca, Sortino, Luca, Berté, Rodrigo, Wang, Juan, Ren, Haoran, Maier, Stefan A., Kivshar, Yuri, Tittl, Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9411165/
https://www.ncbi.nlm.nih.gov/pubmed/36008419
http://dx.doi.org/10.1038/s41467-022-32697-z
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author Kühner, Lucca
Sortino, Luca
Berté, Rodrigo
Wang, Juan
Ren, Haoran
Maier, Stefan A.
Kivshar, Yuri
Tittl, Andreas
author_facet Kühner, Lucca
Sortino, Luca
Berté, Rodrigo
Wang, Juan
Ren, Haoran
Maier, Stefan A.
Kivshar, Yuri
Tittl, Andreas
author_sort Kühner, Lucca
collection PubMed
description All-dielectric nanophotonics underpinned by the physics of bound states in the continuum (BICs) have demonstrated breakthrough applications in nanoscale light manipulation, frequency conversion and optical sensing. Leading BIC implementations range from isolated nanoantennas with localized electromagnetic fields to symmetry-protected metasurfaces with controllable resonance quality (Q) factors. However, they either require structured light illumination with complex beam-shaping optics or large, fabrication-intense arrays of polarization-sensitive unit cells, hindering tailored nanophotonic applications and on-chip integration. Here, we introduce radial quasi-bound states in the continuum (radial BICs) as a new class of radially distributed electromagnetic modes controlled by structural asymmetry in a ring of dielectric rod pair resonators. The radial BIC platform provides polarization-invariant and tunable high-Q resonances with strongly enhanced near fields in an ultracompact footprint as low as 2 µm(2). We demonstrate radial BIC realizations in the visible for sensitive biomolecular detection and enhanced second-harmonic generation from monolayers of transition metal dichalcogenides, opening new perspectives for compact, spectrally selective, and polarization-invariant metadevices for multi-functional light-matter coupling, multiplexed sensing, and high-density on-chip photonics.
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spelling pubmed-94111652022-08-27 Radial bound states in the continuum for polarization-invariant nanophotonics Kühner, Lucca Sortino, Luca Berté, Rodrigo Wang, Juan Ren, Haoran Maier, Stefan A. Kivshar, Yuri Tittl, Andreas Nat Commun Article All-dielectric nanophotonics underpinned by the physics of bound states in the continuum (BICs) have demonstrated breakthrough applications in nanoscale light manipulation, frequency conversion and optical sensing. Leading BIC implementations range from isolated nanoantennas with localized electromagnetic fields to symmetry-protected metasurfaces with controllable resonance quality (Q) factors. However, they either require structured light illumination with complex beam-shaping optics or large, fabrication-intense arrays of polarization-sensitive unit cells, hindering tailored nanophotonic applications and on-chip integration. Here, we introduce radial quasi-bound states in the continuum (radial BICs) as a new class of radially distributed electromagnetic modes controlled by structural asymmetry in a ring of dielectric rod pair resonators. The radial BIC platform provides polarization-invariant and tunable high-Q resonances with strongly enhanced near fields in an ultracompact footprint as low as 2 µm(2). We demonstrate radial BIC realizations in the visible for sensitive biomolecular detection and enhanced second-harmonic generation from monolayers of transition metal dichalcogenides, opening new perspectives for compact, spectrally selective, and polarization-invariant metadevices for multi-functional light-matter coupling, multiplexed sensing, and high-density on-chip photonics. Nature Publishing Group UK 2022-08-25 /pmc/articles/PMC9411165/ /pubmed/36008419 http://dx.doi.org/10.1038/s41467-022-32697-z Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Kühner, Lucca
Sortino, Luca
Berté, Rodrigo
Wang, Juan
Ren, Haoran
Maier, Stefan A.
Kivshar, Yuri
Tittl, Andreas
Radial bound states in the continuum for polarization-invariant nanophotonics
title Radial bound states in the continuum for polarization-invariant nanophotonics
title_full Radial bound states in the continuum for polarization-invariant nanophotonics
title_fullStr Radial bound states in the continuum for polarization-invariant nanophotonics
title_full_unstemmed Radial bound states in the continuum for polarization-invariant nanophotonics
title_short Radial bound states in the continuum for polarization-invariant nanophotonics
title_sort radial bound states in the continuum for polarization-invariant nanophotonics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9411165/
https://www.ncbi.nlm.nih.gov/pubmed/36008419
http://dx.doi.org/10.1038/s41467-022-32697-z
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