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arXiv · 2609.21582

Tunable parametric vibrations in fluid ferroelectric fibres

Alexander Dieter-Jarosik·Hajnalka Nádasi·Rachel Tuffin·Melanie Klasen-Memmer·Alexey Eremin
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Abstract

Freely suspended ferroelectric-nematic fibres combine 1D fluidity with macroscopic spontaneous polarisation. Under alternating electric fields, we observe a sequence of dynamical states, from subthreshold pulsations to polarity-dependent axial flow, and sustained transverse oscillations. We show that the oscillatory state arises from a parametric instability of a liquid string whose effective tension is dominated by the electrical polarisation-field coupling contribution. A Floquet model incorporating finite-time polarisation switching captures the observed resonance tongues, modal selection, and square-wave response. These results establish ferroelectric-nematic fibres as electrically programmable fluid resonators coupling polar order and interfacial flow with nonlinear vibration.

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Alexander Dieter-Jarosik, Hajnalka Nádasi, Rachel Tuffin, Melanie Klasen-Memmer, Alexey Eremin. 2026-09-18. Tunable parametric vibrations in fluid ferroelectric fibres. https://arxiv.org/abs/2609.21582

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