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Elusive pure anapole excitation in homogenous spherical nanoparticles with radial anisotropy
Wei Liu, Bing Lei, Jianhua Shi +2
For homogenous isotropic dielectric nanospheres with incident plane waves, Cartesian electric and toroidal dipoles can be tunned to cancel each other in terms of far-field scatteri…
Tunable nonlinear graphene metasurfaces
Daria A. Smirnova, Andrey E. Miroshnichenko, Yuri S. Kivshar +1
We introduce the concept of nonlinear graphene metasurfaces employing the controllable interaction between a graphene layer and a planar metamaterial. Such hybrid metasurfaces supp…
Efficient excitation and tuning of toroidal dipoles within individual homogenous nanoparticles
Wei Liu, Jianhua Shi, Bing Lei +2
We revisit the fundamental topic of light scattering by single homogenous nanoparticles from the new perspective of excitation and manipulation of toroidal dipoles. It is revealed…
Invisible nanowires with interfering electric and toroidal dipoles
Wei Liu, Jianfa Zhang, Bing Lei +2
By studying the scattering of normally incident planewaves by a single nanowire, we reveal the indispensable role of toroidal multipole excitation in multipole expansions of radiat…
Hybridization and the origin of the Fano resonances in symmetric nanoparticle trimers
Ben Hopkins, Dmitry S. Filonov, Stanislav B. Glybovski +1
We study the light scattering by plasmonic and dielectric symmetric trimers to investigate the existence of polarization-independent Fano resonances. Plasmonic hybridization theory…
Toroidal dipole induced transparency for core-shell nanoparticles
Wei Liu, Jianfa Zhang, Andrey E. Miroshnichenko
We investigate the scattering properties of spherical nanoparticles by employing a Cartesian multipole expansion method which has incorporated radiating toroidal multipoles. It is…