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arXiv · 2603.17748

Isotopic variations and Zeeman-like splitting in the spectra of nonlinear photonic meta-atoms

S. Zhang·I. Babushkin·U. Morgner·A. Demircan·O. Melchert
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Abstract

We study photonic meta-atoms, a unique class of composite solitary wave, supported in nonlinear waveguides. We establish an analogy to one-dimensional soft-core atoms, allowing to describe the complex dynamics via concepts from atomic physics. Higher-order dispersive effects cause specific spectral resonances characteristic for the eigenspectrum of a meta-atom. We demonstrate that subtle changes in this level spectrum causes frequency shifts of the resonances. These shifts consist of isotopic and isomeric contributions that can be distinguished in terms of a simple model. We further demonstrate a generic mechanism that causes a Zeeman-like splitting of resonance lines.

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S. Zhang, I. Babushkin, U. Morgner, A. Demircan, O. Melchert. 2026-03-18. Isotopic variations and Zeeman-like splitting in the spectra of nonlinear photonic meta-atoms. https://arxiv.org/abs/2603.17748

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