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arXiv · 2303.00104

Optical galleries of dielectric rings: antipode to whispering gallery modes

A. P. Chetverikova·M. S. Sidorenko·K. B. Samusev·M. F. Limonov·N. S. Solodovchenko
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Abstract

A general picture of photonic eigenmodes of dielectric rings with a rectangular cross section is presented, which is fundamentally different from those of whispering gallery modes of the disc. The optical spectrum of a rectangular dielectric ring consists of an infinite set of individual galleries, each starting with broad transverse radial or axial Fabry-P\'erot resonances due to two pairs of side faces. Each gallery continues with a set of equidistant longitudinal modes with exponentially increasing quality factors. Transverse radial and axial modes exhibit strict periodicity of line contours in the Fano-Lorentz-Fano-Lorentz... sequence due to the periodicity of cylindrical harmonics. Theoretical and experimental results are in perfect agreement.

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A. P. Chetverikova, M. S. Sidorenko, K. B. Samusev, M. F. Limonov, N. S. Solodovchenko. 2023-02-28. Optical galleries of dielectric rings: antipode to whispering gallery modes. https://arxiv.org/abs/2303.00104

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