Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing
Abstract: 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.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Surface Lattice Resonances in 3D Chiral Metacrystals for Plasmonic Sensing ; day:27 ; month:12 ; year:2022 ; extent:7
Advanced science ; (27.12.2022) (gesamt 7)
- Creator
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Manoccio, Mariachiara
Tasco, Vittorianna
Todisco, Francesco
Passaseo, Adriana
Cuscuna, Massimo
Tarantini, Iolena
Gigli, Giuseppe
Esposito, Marco
- DOI
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10.1002/advs.202206930
- URN
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urn:nbn:de:101:1-2022122814104036485322
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:25 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Manoccio, Mariachiara
- Tasco, Vittorianna
- Todisco, Francesco
- Passaseo, Adriana
- Cuscuna, Massimo
- Tarantini, Iolena
- Gigli, Giuseppe
- Esposito, Marco
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