Fano Resonance in a Subwavelength Mie-based Metamolecule with Split Ring Resonator

摘要

In this letter, we report a method of symmetry-breaking in an artificialMie-based metamolecule. A Fano resonance with a Q factor of 96 is observed atmicrowave frequencies in a structure combining a split ring resonator (SRR) anda high-permittivity dielectric cube. Calculations indicate resonant frequencytunability will result from altering the cube's permittivity. The asymmetricspectrum is attributed to both constructive and destructive near-fieldinteractions between the two distinct resonators. Experimental data andsimulation results are in good agreement. The underlying physics is seen infield distribution and dipole analysis. This work substantiates an approach forthe manipulation of Mie resonances which can potentially be utilized in lightmodulating and sensing.