Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement
Abstract: High-index dielectric nanoantennas, which provide an interplay between electric and magnetic modes, have been widely used as building blocks for a variety of devices and metasurfaces, both in linear and nonlinear regimes. Here, we investigate hybrid metal-semiconductor nanoantennas, consisting of a multimode silicon nanopillar core coated with a gold layer, that offer an enhanced degree of control over the mode selection and confinement, and emission of light on the nanoscale exploiting high-order electric and magnetic resonances. Cathodoluminescence spectra revealed a multitude of resonant modes supported by the nanoantennas due to hybridization of the Mie resonances of the core and the plasmonic resonances of the shell. Eigenmode analysis revealed the modes that exhibit enhanced field localization at the gold interface, together with high confinement within the nanopillar volume. Consequently, this architecture provides a flexible means of engineering nanoscale components with tailored optical modes and field confinement for a plethora of applications, including sensing, hot-electron photodetection and nanophotonics with cylindrical vector beams.
- 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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Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement ; volume:12 ; number:14 ; year:2023 ; pages:2997-3005 ; extent:9
Nanophotonics ; 12, Heft 14 (2023), 2997-3005 (gesamt 9)
- Creator
- DOI
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10.1515/nanoph-2023-0105
- URN
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urn:nbn:de:101:1-2023071414081524560503
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:59 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- McPolin, Cillian P. T.
- Vila, Yago N.
- Krasavin, Alexey V.
- Llorca, Jordi
- Zayats, Anatoly V.
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