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Plasmonic Toroidal Dipolar Response under Radially Polarized Excitation.
- Source :
-
Scientific Reports . 6/26/2015, p11793. 1p. - Publication Year :
- 2015
-
Abstract
- Plasmonic toroidal resonance has attracted growing interests because of its low loss electromagnetic properties and potential high sensitive nanophotonic applications. However, the realization in a metamaterial requires three-dimensional complicated structural design so far. In this paper, we design a simple metal-dielectric-metal (MIM) sandwich nanostructure, which exhibits a strong toroidal dipolar resonance under radially polarized excitation. The toroidal dipole moment as the dominant contribution for the scattering is demonstrated by the mirror-image method and further analyzed by Lagrangian hybridization model. The proposed toroidal configuration also shows a highly tolerant for misalignment between the structure center and the incident light focus. Our study proves the way for the toroidal plasmonic application with the cylindrical vector beams. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TOROIDAL plasma
*ELECTRONIC excitation
*NANOPHOTONICS
*NANOSTRUCTURES
*VECTOR beams
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- Academic Search Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 103447428
- Full Text :
- https://doi.org/10.1038/srep11793