Efficient excitation and tuning of toroidal dipoles within individual homogenous nanoparticles
arXiv:1508.02520 · doi:10.1364/OE.23.024738
Abstract
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 that besides within all-dielectric particles, toroidal dipoles can also be efficiently excited within homogenous metallic nanoparticles. Moreover, we show that those toroidal dipoles excited can be spectrally tuned through adjusting the radial anisotropy parameters of the materials, which paves the way for further more flexible manipulations of the toroidal responses within photonic systems. The study into toroidal multipole excitation and tuning within nanoparticles deepens our understanding of the seminal problem of light scattering, and may incubate many scattering related fundamental researches and applications.
Four Figures,Ten Pages and Comments Welcomed
References in corpus (13)
- Topological Photonics
- Two-Dimensional Material Nanophotonics
- Magnetic light
- Dielectric Metamaterials with Toroidal Dipolar Response
- Ultra-directional forward scattering by individual core-shell nanoparticles
- Toroidal dipole response in a multifold double-ring metamaterial
- Toroidal dipole induced transparency for core-shell nanoparticles
- Invisible nanowires with interfering electric and toroidal dipoles
- Exact dipolar moments of a localized electric current distribution
- Ultra-directional super-scattering of homogenous spherical particles with radial anisotropy
- Control of light scattering by nanoparticles with optically-induced magnetic responses
- Core-Shell Structured Dielectric-Metal Circular Nanodisk Antenna: Gap Plasmon Assisted Magnetic Toroid-like Cavity Modes
- Geometric interpretations for resonances of plasmonic nanoparticles
Cited by in corpus (9)
- Generalized Kerker Effects in Nanophotonics and Meta-Optics
- Optical anapoles in nanophotonics and meta-optics
- Multipolar interference effects in nanophotonics
- On the dynamic toroidal multipoles from localized electric current distributions
- Elusive pure anapole excitation in homogenous spherical nanoparticles with radial anisotropy
- Tuning toroidal dipole resonances in dielectric metamolecules by an additional electric dipolar response
- Disorder-immune metasurfaces with constituents exhibiting the anapole mode
- Electric and magnetic toroidal dipole excitations in core-shell spheres
- Gain-controlled directional scattering in core-shell nanoparticles mediated by magnetic toroidal dipoles