Interaction between coaxial dielectric disks enhances the Q-factor

Abstract

We study the behavior of resonant modes under variation of the distance between two coaxial dielectric disks and show an avoided crossing of resonances because of interaction between the disks. Owing to coaxial arrange of disks the consideration is separated by the azimuthal index $m=0,1,2,\dots$. In the present paper we consider the case $m=0$. For a long enough distance the resonant modes can be classified as symmetric and antisymmetric hybridizations of the resonant modes of the isolated disk. With decreasing of the distance the interaction becomes stronger that gives rise to avoided crossing of different resonances of the isolated disk. That in turn enhances the $Q$ factor of two disks by one order in magnitude compared to the $Q$ factor of isolated disk.

6 pages, 6 figures

References in corpus (8)

• High-Q supercavity modes in subwavelength dielectric resonators
• Formation of long-lived, scarlike modes near avoided resonance crossings in optical microcavities
• Bloch bound states in the radiation continuum in a periodic array of dielectric rods
• Brillouin-Wigner perturbation theory in open electromagnetic systems
• Goos-Haenchen shift and localization of optical modes in deformed microcavities
• Coupling of whispering-gallery modes in size-mismatched microdisk photonic molecules
• Bound states in the continuum with high orbital angular momentum in a dielectric rod with periodically modulated permittivity
• Superradiant and Dark States in Non-Hermitian Plasmonic Antennas and Waveguides

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• Resonance frequency and radiative Q-factor of plasmonic and dielectric modes of small objects
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• Giant resonant enhancement of optical binding of dielectric particles
• Giant resonant enhancement of optical binding of dielectric disks