title: Invisible nanowires with interfering electric and toroidal dipoles.
abstract: By studying the scattering of normally incident plane waves 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 noninvasive detections and measurements.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Jianfa
authors.initials: J
authors.lastname: Zhang
authors.forename: Bing
authors.initials: B
authors.lastname: Lei
authors.forename: Haojun
authors.initials: H
authors.lastname: Hu
authors.forename: Andrey E
authors.initials: AE
authors.lastname: Miroshnichenko