Extremely High Q-factor metamaterials due to Anapole Excitation

Abstract

We demonstrate that ideal anapole metamaterials have infinite Q-factor. We have designed and fabricated a metamaterial consisting of planar metamolecules which exhibit anapole behavior in the sense that the electric dipole radiation is almost cancelled by the toroidal dipole one, producing thus an extremely high Q-factor at the resonance frequency. The size of the system, at the mm range, and the parasitic magnetic quadrupole radiation are the factors limiting the size of the Q-factor. In spite of the very low radiation losses the local fields at the metamolecules are extremely high, of the order of higher than the external incoming field.

References in corpus (4)

• Classical Analogue of Electromagnetically Induced Transparency with a Metal-Superconductor Hybrid Metamaterial
• Dielectric Metamaterials with Toroidal Dipolar Response
• Toroidal metamaterial
• Invisible nanowires with interfering electric and toroidal dipoles

Cited by in corpus (6)

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• Active Control of Bound States in the Continuum in Toroidal Metasurfaces
• Theory, observation and ultrafast response of novel hybrid anapole states
• Detection of Hybrid Optical Anapoles in Dielectric Microspheres
• Anapole mode excitation in novel perforated all-dielectric metamaterials
• Nontrivial Pure Zero-Scattering Regime Delivered by a Hybrid Anapole State