{"title":"Optical Properties of the Substrate-Buried Spherical Dipole Nanoantenna","authors":"A. V. Dyshlyuk, N. A. Inogamov, O. B. Vitrik","doi":"10.1134/S1062873824710006","DOIUrl":null,"url":null,"abstract":"<p>We studied the properties of a plasmonic nanoantenna in the form of a subwavelength metal sphere partly buried in a metal substrate with a hollow gap between the sphere and the substrate. Using a nickel sphere in a nickel substrate as an example, it is shown that imbedding a metal sphere deep into the substrate leads to the broadening and a strong red shift of its dipole resonance. Significant enhancement of the near electromagnetic field of the sphere in the gap region is demonstrated. The effect of all geometric parameters of the nanoantenna under study on its optical performance is studied. Enhanced transmission of a metal film with defects in the form of spherical particles embedded in it is demonstrated, which results from the leaking of the near electromagnetic field from the gaps to the opposite side of the film. The obtained results can find application in nanooptics for designing plasmonic nanoantennas for concentration, enhancement and redistribution of the electromagnetic field.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 3 supplement","pages":"S450 - S456"},"PeriodicalIF":0.4800,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Russian Academy of Sciences: Physics","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1062873824710006","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Physics and Astronomy","Score":null,"Total":0}
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Abstract
We studied the properties of a plasmonic nanoantenna in the form of a subwavelength metal sphere partly buried in a metal substrate with a hollow gap between the sphere and the substrate. Using a nickel sphere in a nickel substrate as an example, it is shown that imbedding a metal sphere deep into the substrate leads to the broadening and a strong red shift of its dipole resonance. Significant enhancement of the near electromagnetic field of the sphere in the gap region is demonstrated. The effect of all geometric parameters of the nanoantenna under study on its optical performance is studied. Enhanced transmission of a metal film with defects in the form of spherical particles embedded in it is demonstrated, which results from the leaking of the near electromagnetic field from the gaps to the opposite side of the film. The obtained results can find application in nanooptics for designing plasmonic nanoantennas for concentration, enhancement and redistribution of the electromagnetic field.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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