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Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing

Chiral lattice modes are hybrid states arising from the chiral plasmonic particles assembled in ordered arrays with opportune periodicity. These resonances exhibit dependence on excitation handedness, and their observation in plasmonic lattices is strictly related to the chiroptical features of the...

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Autores principales: Manoccio, Mariachiara, Tasco, Vittorianna, Todisco, Francesco, Passaseo, Adriana, Cuscuna, Massimo, Tarantini, Iolena, Gigli, Giuseppe, Esposito, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9951338/
https://www.ncbi.nlm.nih.gov/pubmed/36575146
http://dx.doi.org/10.1002/advs.202206930
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author Manoccio, Mariachiara
Tasco, Vittorianna
Todisco, Francesco
Passaseo, Adriana
Cuscuna, Massimo
Tarantini, Iolena
Gigli, Giuseppe
Esposito, Marco
author_facet Manoccio, Mariachiara
Tasco, Vittorianna
Todisco, Francesco
Passaseo, Adriana
Cuscuna, Massimo
Tarantini, Iolena
Gigli, Giuseppe
Esposito, Marco
author_sort Manoccio, Mariachiara
collection PubMed
description Chiral lattice modes are hybrid states arising from the chiral plasmonic particles assembled in ordered arrays with opportune periodicity. These resonances exhibit dependence on excitation handedness, and their observation in plasmonic lattices is strictly related to the chiroptical features of the fundamental plasmonic unit. Here, the emergence of chiral surface lattice resonances (c‐SLRs) is shown in properly engineered arrays of nanohelices (NHs), fully three dimensional (3D) chiral nano‐objects fabricated by focused ion beam processing. By tuning the relative weight of plasmonic and photonic components in the hybrid mode, the physical mechanism of strong diffractive coupling leading to the emergence of the lattice modes is analyzed, opening the way to the engineering of chiral plasmonic systems for sensing applications. In particular, a coupling regime is identified where the combination of a large intrinsic circular dichroism (CD) of the plasmonic resonance with a well‐defined balance between the photonic quality factor (Q factor) and the plasmonic field enhancement (M) maximizes the capability of the system to discriminate refractive index (RI) changes in the surrounding medium. The results lay the foundation for exploiting CD in plasmonic lattices to high performance refractometric sensing.
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spelling pubmed-99513382023-02-25 Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing Manoccio, Mariachiara Tasco, Vittorianna Todisco, Francesco Passaseo, Adriana Cuscuna, Massimo Tarantini, Iolena Gigli, Giuseppe Esposito, Marco Adv Sci (Weinh) Research Articles Chiral lattice modes are hybrid states arising from the chiral plasmonic particles assembled in ordered arrays with opportune periodicity. These resonances exhibit dependence on excitation handedness, and their observation in plasmonic lattices is strictly related to the chiroptical features of the fundamental plasmonic unit. Here, the emergence of chiral surface lattice resonances (c‐SLRs) is shown in properly engineered arrays of nanohelices (NHs), fully three dimensional (3D) chiral nano‐objects fabricated by focused ion beam processing. By tuning the relative weight of plasmonic and photonic components in the hybrid mode, the physical mechanism of strong diffractive coupling leading to the emergence of the lattice modes is analyzed, opening the way to the engineering of chiral plasmonic systems for sensing applications. In particular, a coupling regime is identified where the combination of a large intrinsic circular dichroism (CD) of the plasmonic resonance with a well‐defined balance between the photonic quality factor (Q factor) and the plasmonic field enhancement (M) maximizes the capability of the system to discriminate refractive index (RI) changes in the surrounding medium. The results lay the foundation for exploiting CD in plasmonic lattices to high performance refractometric sensing. John Wiley and Sons Inc. 2022-12-27 /pmc/articles/PMC9951338/ /pubmed/36575146 http://dx.doi.org/10.1002/advs.202206930 Text en © 2022 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Manoccio, Mariachiara
Tasco, Vittorianna
Todisco, Francesco
Passaseo, Adriana
Cuscuna, Massimo
Tarantini, Iolena
Gigli, Giuseppe
Esposito, Marco
Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
title Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
title_full Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
title_fullStr Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
title_full_unstemmed Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
title_short Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
title_sort surface lattice resonances in 3d chiral metacrystals for plasmonic sensing
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9951338/
https://www.ncbi.nlm.nih.gov/pubmed/36575146
http://dx.doi.org/10.1002/advs.202206930
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