--- _id: '4165' abstract: - lang: eng text: Metal nanoparticles host localized plasmon excitations that allow the manipulation of optical fields at the nanoscale. Despite the availability of several techniques for imaging plasmons, direct access into the symmetries of these excitations remains elusive, thus hindering progress in the development of applications. Here, we present a combination of angle-, polarization-, and space-resolved cathodoluminescence spectroscopy methods to selectively access the symmetry and degeneracy of plasmonic states in lithographically fabricated gold nanoprisms. We experimentally reveal and spatially map degenerate states of multipole plasmon modes with nanometer spatial resolution and further provide recipes for resolving optically dark and out-of-plane modes. Full-wave simulations in conjunction with a simple tight-binding model explain the complex plasmon structure in these particles and reveal intriguing mode-symmetry phenomena. Our approach introduces systematics for a comprehensive symmetry characterization of plasmonic states in high-symmetry nanostructures. article_type: original author: - first_name: Viktor full_name: Myroshnychenko, Viktor id: '46371' last_name: Myroshnychenko - first_name: Natsuki full_name: Nishio, Natsuki last_name: Nishio - first_name: F. Javier full_name: García de Abajo, F. Javier last_name: García de Abajo - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Naoki full_name: Yamamoto, Naoki last_name: Yamamoto citation: ama: Myroshnychenko V, Nishio N, García de Abajo FJ, Förstner J, Yamamoto N. Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution. ACS Nano. 2018;12(8):8436-8446. doi:10.1021/acsnano.8b03926 apa: Myroshnychenko, V., Nishio, N., García de Abajo, F. J., Förstner, J., & Yamamoto, N. (2018). Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution. ACS Nano, 12(8), 8436–8446. https://doi.org/10.1021/acsnano.8b03926 bibtex: '@article{Myroshnychenko_Nishio_García de Abajo_Förstner_Yamamoto_2018, title={Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution}, volume={12}, DOI={10.1021/acsnano.8b03926}, number={8}, journal={ACS Nano}, publisher={American Chemical Society (ACS)}, author={Myroshnychenko, Viktor and Nishio, Natsuki and García de Abajo, F. Javier and Förstner, Jens and Yamamoto, Naoki}, year={2018}, pages={8436–8446} }' chicago: 'Myroshnychenko, Viktor, Natsuki Nishio, F. Javier García de Abajo, Jens Förstner, and Naoki Yamamoto. “Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution.” ACS Nano 12, no. 8 (2018): 8436–46. https://doi.org/10.1021/acsnano.8b03926.' ieee: V. Myroshnychenko, N. Nishio, F. J. García de Abajo, J. Förstner, and N. Yamamoto, “Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution,” ACS Nano, vol. 12, no. 8, pp. 8436–8446, 2018. mla: Myroshnychenko, Viktor, et al. “Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution.” ACS Nano, vol. 12, no. 8, American Chemical Society (ACS), 2018, pp. 8436–46, doi:10.1021/acsnano.8b03926. short: V. Myroshnychenko, N. Nishio, F.J. García de Abajo, J. Förstner, N. Yamamoto, ACS Nano 12 (2018) 8436–8446. date_created: 2018-08-28T07:44:24Z date_updated: 2022-01-06T07:00:27Z ddc: - '530' department: - _id: '61' - _id: '230' doi: 10.1021/acsnano.8b03926 file: - access_level: open_access content_type: application/pdf creator: hclaudia date_created: 2018-08-28T07:45:47Z date_updated: 2018-09-03T13:54:21Z file_id: '4166' file_name: 2018 Myroshnychenko,Nishio,Garcia de Abajo,Förstner,Yamamoto_Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution.pdf file_size: 4463352 relation: main_file file_date_updated: 2018-09-03T13:54:21Z has_accepted_license: '1' intvolume: ' 12' issue: '8' keyword: - tet_topic_plasmonics language: - iso: eng oa: '1' page: 8436-8446 project: - _id: '53' name: TRR 142 - _id: '56' name: TRR 142 - Project Area C - _id: '75' name: TRR 142 - Subproject C5 publication: ACS Nano publication_identifier: issn: - 1936-0851 - 1936-086X publication_status: published publisher: American Chemical Society (ACS) status: public title: Unveiling and Imaging Degenerate States in Plasmonic Nanoparticles with Nanometer Resolution type: journal_article urn: '41659' user_id: '158' volume: 12 year: '2018' ...