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Exceptional points in optical sphere dimers

Published on:

27 July 2023

Primary Category:

Optics

Paper Authors:

Alexey A. Dmitriev,

Mikhail V. Rybin

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Key Details

Exceptional points cause degeneracy and can make optics systems defective

Parity-time symmetry breaking exceptional points need gain/loss contrast

Retardation can cause exceptional points without any gain/loss contrast

The two regimes have a smooth transition between them

Formulas connect sphere parameters to exceptional point properties

AI generated summary

Exceptional points in optical sphere dimers

This paper analyzes exceptional points, which are degeneracies in non-Hermitian systems, in optical dimers made of two dielectric spheres. It shows these can arise due to parity-time symmetry breaking when gain/loss contrast is introduced, or due to retardation effects causing an internal frequency dependence, even without any material contrast.

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