Probing Ultrafast Magnetization Dynamics via Synthetic Axion Fields
Spatial structuring of materials at subwavelength scales underlies the concept of metamaterials possessing exotic properties beyond those of the constituent media. Temporal modulation of material parameters enables further functionalities. Here, we show that high-frequency oscillations of spatially uniform magnetization generate an effective dynamic axion field embedding the amplitude and phase of magnetization oscillations. This allows one to map ultrafast magnetization dynamics using a probe signal with much lower frequency.
Authors
- Leon Shaposhnikov (ORCID: https://orcid.org/0000-0002-6081-4095)
- Maxim A. Gorlach (ORCID: https://orcid.org/0000-0002-7880-8953)
- Frank Wilczek (ORCID: https://orcid.org/0000-0002-6489-6155)
- Eduardo Barredo-Alamilla (ORCID: https://orcid.org/0000-0002-7257-5386)
Institutions
- Stockholm University (SE)
- ITMO University (RU)
- Shanghai Jiao Tong University (CN)
- Arizona State University (US)
- Massachusetts Institute of Technology (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1103/2rrr-glyn
- Citations
- 3
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 5.61
Funders
- Russian Science Foundation
- Foundation for the Advancement of Theoretical Physics and Mathematics