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29 March 2024
 
  » arxiv » 1502.2205

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Invisible nanowires with interferencing electric and toroidal dipoles
Wei Liu ; Jianfa Zhang ; Bing Lei ; Haojun Hu ; Andrey E. Miroshnichenko ;
Date 8 Feb 2015
AbstractBy studying the scattering of normally incident planewaves by a single nanowire, we reveal the indispensable role of toroidal multipole excitation in multipole expansions of radiating sources. It is found that for both p-polarized and s-polarized incident waves, toroidal dipoles can be effectively excited within homogenous dielectric nanowires in the optical spectrum regime. We further demonstrate that the plasmonic core-shell nanowires can be rendered invisible through destructive interference of the electric and toroidal dipoles, which may inspire many nanowire based light-matter interaction studies, and incubate biological and medical applications that require non-invasive detections and measurements.
Source arXiv, 1502.2205
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