Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-05-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2023-0105 |
| _version_ | 1826963981699383296 |
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| author | McPolin Cillian P. T. Vila Yago N. Krasavin Alexey V. Llorca Jordi Zayats Anatoly V. |
| author_facet | McPolin Cillian P. T. Vila Yago N. Krasavin Alexey V. Llorca Jordi Zayats Anatoly V. |
| author_sort | McPolin Cillian P. T. |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T17:04:15Z |
| format | Article |
| id | doaj.art-a72d280784504ad780674864d9a05807 |
| institution | Directory Open Access Journal |
| issn | 2192-8606 2192-8614 |
| language | English |
| last_indexed | 2025-02-18T02:48:45Z |
| publishDate | 2023-05-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-a72d280784504ad780674864d9a058072024-11-25T11:19:10ZengDe GruyterNanophotonics2192-86062192-86142023-05-0112142997300510.1515/nanoph-2023-0105Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinementMcPolin Cillian P. T.0Vila Yago N.1Krasavin Alexey V.2Llorca Jordi3Zayats Anatoly V.4Department of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Chemical Engineering, Universitat Politècnica de Catalunya, EEBE, Barcelona, SpainDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKHigh-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.https://doi.org/10.1515/nanoph-2023-0105cathodoluminescencehybrid nanoantennasmie resonancesplasmonic nanostructuressilicon nanopillars |
| spellingShingle | McPolin Cillian P. T. Vila Yago N. Krasavin Alexey V. Llorca Jordi Zayats Anatoly V. Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement Nanophotonics cathodoluminescence hybrid nanoantennas mie resonances plasmonic nanostructures silicon nanopillars |
| title | Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement |
| title_full | Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement |
| title_fullStr | Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement |
| title_full_unstemmed | Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement |
| title_short | Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement |
| title_sort | multimode hybrid gold silicon nanoantennas for tailored nanoscale optical confinement |
| topic | cathodoluminescence hybrid nanoantennas mie resonances plasmonic nanostructures silicon nanopillars |
| url | https://doi.org/10.1515/nanoph-2023-0105 |
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