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Updated: May 2, 2026

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
Published on: May 12, 2023
Large-amplitude spin dynamics driven by a THz pulse in resonance with an electromagnon
T Kubacka1, J A Johnson, M C Hoffmann
1Institute for Quantum Electronics, Eidgenössische Technische Hochschule (ETH) Zürich, Wolfgang-Pauli-Strasse 16, 8093 Zürich, Switzerland.
Abstract:
Multiferroics have attracted strong interest for potential applications where electric fields control magnetic order. The ultimate speed of control via magnetoelectric coupling, however, remains largely unexplored. Here, we report an experiment in which we drove spin dynamics in multiferroic TbMnO3 with an intense few-cycle terahertz (THz) light pulse tuned to resonance with an electromagnon, an electric-dipole active spin excitation. We observed the resulting spin motion using time-resolved resonant soft x-ray diffraction. Our results show that it is possible to directly manipulate atomic-scale magnetic structures with the electric field of light on a sub-picosecond time scale.
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