Multimode hybrid gold-silicon nanoantennas for tailored nanoscale optical confinement
Author:
McPolin Cillian P. T.1ORCID, Vila Yago N.12, Krasavin Alexey V.1ORCID, Llorca Jordi3, Zayats Anatoly V.1ORCID
Affiliation:
1. Department of Physics and London Centre for Nanotechnology , King’s College London , Strand , London WC2R 2LS , UK 2. Universitat Politècnica de Catalunya, Escola Tècnica Superior d’Enginyeria de Telecomunicacions de Barcelona , Barcelona , Spain 3. Department of Chemical Engineering, Universitat Politècnica de Catalunya, EEBE , Barcelona , Spain
Abstract
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.
Funder
H2020 European Research Council Engineering and Physical Sciences Research Council
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
Reference55 articles.
1. P. Cheben, R. Halir, J. H. Schmid, H. A. Atwater, and D. R. Smith, “Subwavelength integrated photonics,” Nature, vol. 560, no. 7720, pp. 565–572, 2018. https://doi.org/10.1038/s41586-018-0421-7. 2. D. Lin, P. Fan, E. Hasman, and M. L. Brongersma, “Dielectric gradient metasurface optical elements,” Science, vol. 345, no. 6194, pp. 298–302, 2014. https://doi.org/10.1126/science.1253213. 3. Y. Liu and X. Zhang, “Metamaterials: a new Frontier of science and technology,” Chem. Soc. Rev., vol. 40, no. 5, pp. 2494–2507, 2011. https://doi.org/10.1039/c0cs00184h. 4. J. R. Mejia-Salazar and O. N. OliveiraJr., “Plasmonic biosensing,” Chem. Rev., vol. 118, no. 20, pp. 10617–10625, 2018. https://doi.org/10.1021/acs.chemrev.8b00359. 5. P. Wang, M. E. Nasir, A. V. Krasavin, W. Dickson, Y. Jiang, and A. V. Zayats, “Plasmonic metamaterials for nanochemistry and sensing,” Acc. Chem. Res., vol. 52, no. 11, pp. 3018–3028, 2019. https://doi.org/10.1021/acs.accounts.9b00325.
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