Sub-millimeter propagation of antiferromagnetic magnons via magnon-photon coupling
arXiv:2302.01821 · doi:10.1038/s44306-024-00034-3
Abstract
For the realization of magnon-based current-free technologies, referred to as magnonics, all-optical control of magnons is an important technique for both fundamental research and practical applications. Magnon-polariton is a coupled state of magnon and photon in a magnetic medium, expected to exhibit magnon-like controllability and photon-like high-speed propagation. While recent studies have observed magnon-polaritons as modulation of incident terahertz waves, the influence of magnon-photon coupling on magnon propagation properties remains unexplored. This study aimed to observe the spatiotemporal dynamics of coherent magnon-polaritons through time-resolved imaging measurements. BiFeO was selected as the sample due to its anticipated strong coupling between magnons and photons. The observed dynamics suggest that antiferromagnetic magnons can propagate over long distances, up to hundreds of micrometers, through strong coupling with photons. These results enhance our understanding of the optical control of magnonic systems, thereby paving the way for terahertz opto-magnonics.
17 pages, 2 figures
References in corpus (10)
- Realization of XNOR and NAND spin-wave logic gates
- Roadmap on Spin-Wave Computing
- Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
- Electric-field control of spin waves at room temperature in multiferroic BiFeO3
- Coherent spin-wave transport in an antiferromagnet
- Optical coupling to spin waves in the cycloidal multiferroic BiFeO3
- Long-distance propagation of high-velocity antiferromagnetic spin waves
- Spin and lattice excitations of a BiFeO3 thin film and ceramics
- Selection rules and dynamic magnetoelectric effect of the spin waves in multiferroic BiFeO
- Selective imaging of terahertz electric field of phonon-polariton in LiNbO