Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization
Abstract Surface plasmons offer a promising avenue in the pursuit of swift and localized manipulation of magnetism for advanced magnetic storage and information processing technology. However, observing and understanding spatiotemporal interactions between surface plasmons and spins remains challeng...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-56158-5 |
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| _version_ | 1832585601842413568 |
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| author | Yuzhu Fan Gaolong Cao Sheng Jiang Johan Åkerman Jonas Weissenrieder |
| author_facet | Yuzhu Fan Gaolong Cao Sheng Jiang Johan Åkerman Jonas Weissenrieder |
| author_sort | Yuzhu Fan |
| collection | DOAJ |
| description | Abstract Surface plasmons offer a promising avenue in the pursuit of swift and localized manipulation of magnetism for advanced magnetic storage and information processing technology. However, observing and understanding spatiotemporal interactions between surface plasmons and spins remains challenging, hindering optimal optical control of magnetism. Here, we demonstrate the spatiotemporal observation of patterned ultrafast demagnetization dynamics in permalloy mediated by propagating surface plasmon polaritons with sub-picosecond time- and sub-μm spatial- scales by employing Lorentz ultrafast electron microscopy combined with excitation through transient optical gratings. We discover correlated spatial distributions of demagnetization amplitude and surface plasmon polariton intensity, the latter characterized by photo-induced near-field electron microscopy. Furthermore, by comparing the results with patterned ultrafast demagnetization dynamics without surface plasmon polariton interaction, we show that the demagnetization is not only enhanced but also exhibits a spatiotemporal modulation near a spatial discontinuity (plasmonic hot spot). Our findings shed light on the intricate interplay between surface plasmons and spins, offer insights into the optimized control of optical excitation of magnetic materials and push the boundaries of ultrafast manipulation of magnetism. |
| format | Article |
| id | doaj-art-e67e0163b6764c068d3115e1c4512cef |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-e67e0163b6764c068d3115e1c4512cef2025-01-26T12:42:34ZengNature PortfolioNature Communications2041-17232025-01-011611910.1038/s41467-025-56158-5Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetizationYuzhu Fan0Gaolong Cao1Sheng Jiang2Johan Åkerman3Jonas Weissenrieder4School of Engineering Sciences, KTH Royal Institute of Technology, Applied Physics, AlbaNovaSchool of Engineering Sciences, KTH Royal Institute of Technology, Applied Physics, AlbaNovaSchool of Microelectronics, South China University of TechnologyDepartment of Physics, University of GothenburgSchool of Engineering Sciences, KTH Royal Institute of Technology, Applied Physics, AlbaNovaAbstract Surface plasmons offer a promising avenue in the pursuit of swift and localized manipulation of magnetism for advanced magnetic storage and information processing technology. However, observing and understanding spatiotemporal interactions between surface plasmons and spins remains challenging, hindering optimal optical control of magnetism. Here, we demonstrate the spatiotemporal observation of patterned ultrafast demagnetization dynamics in permalloy mediated by propagating surface plasmon polaritons with sub-picosecond time- and sub-μm spatial- scales by employing Lorentz ultrafast electron microscopy combined with excitation through transient optical gratings. We discover correlated spatial distributions of demagnetization amplitude and surface plasmon polariton intensity, the latter characterized by photo-induced near-field electron microscopy. Furthermore, by comparing the results with patterned ultrafast demagnetization dynamics without surface plasmon polariton interaction, we show that the demagnetization is not only enhanced but also exhibits a spatiotemporal modulation near a spatial discontinuity (plasmonic hot spot). Our findings shed light on the intricate interplay between surface plasmons and spins, offer insights into the optimized control of optical excitation of magnetic materials and push the boundaries of ultrafast manipulation of magnetism.https://doi.org/10.1038/s41467-025-56158-5 |
| spellingShingle | Yuzhu Fan Gaolong Cao Sheng Jiang Johan Åkerman Jonas Weissenrieder Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization Nature Communications |
| title | Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization |
| title_full | Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization |
| title_fullStr | Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization |
| title_full_unstemmed | Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization |
| title_short | Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization |
| title_sort | spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization |
| url | https://doi.org/10.1038/s41467-025-56158-5 |
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