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arXiv · 2602.05473

Ferron-Polaritons in Superconductor/Ferroelectric/Superconductor Heterostructures

M. Nursagatov·Xiyin Ye·G. A. Bobkov·Tao Yu·I. V. Bobkova
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Abstract

We predict the formation of ferron-polariton - a hybrid light-matter quasiparticle arising from the coupling between collective ferroelectric excitations (ferrons) and Swihart photons in a superconductor/ferroelectric/superconductor heterostructure. The coupling provides direct evidence for ferrons and reaches the ultrastrong-coupling regime, with a spectral gap in the terahertz range, orders of magnitude larger than those in magnetic analogues, reflecting the superior strength of electric dipole interactions. Our work establishes superconductor-ferroelectric heterostructures as a novel platform for exploring extreme light-matter coupling and for developing high-speed, ferroelectric-based quantum technologies at terahertz frequencies.

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M. Nursagatov, Xiyin Ye, G. A. Bobkov, Tao Yu, I. V. Bobkova. 2026-02-05. Ferron-Polaritons in Superconductor/Ferroelectric/Superconductor Heterostructures. https://arxiv.org/abs/2602.05473

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