Lattice effect on electric and magnetic resonance overlap in periodic array
arXiv:1812.09465 · doi:10.1515/nanoph-2018-0107
Abstract
Designing the shape of silicon nanoparticles has been shown to be an effective approach to increasing overlap between electric and magnetic dipole resonances thereby achieving directional scattering and decrease of reflection. Variations of disk diameter and/or height affect resonances differently and can thus result in resonance overlap. In most of the studies, the disks are arranged in a periodic array where the periodicity is varied together with disk diameter, but the role of lattice effect is neglected. Here we theoretically study a periodic array of disks and show that the contribution of the lattice effect in shifting resonance positions is comparable to the effect of the diameter change. We demonstrate that the lattice effect is important even when the wavelength of diffraction remains on the blue side from electric and magnetic dipole resonances and there are no additional lattice resonances are excited. Period and disk dimensions are chosen so that the resonances overlap in the proximity of the telecommunication wavelength which is of great practical interest.
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Cited by in corpus (8)
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- All-optical scattering control in an all-dielectric quasi-perfect absorbing Huygens metasurface
- Multipole analysis of substrate-supported dielectric nanoresonator arrays with T-matrix method
- Plasmonic lattice Kerker effect in UV-Vis spectral range
- Strong optical coupling in metallo-dielectric hybrid metasurfaces
- Polarization-independent resonant lattice Kerker effect in phase-change metasurface
- Bipartite Dielectric Huygens' Metasurface for Anomalous Refraction
- Active Tuning of Resonant Lattice Kerker Effect