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Nanoscale sub-100 picosecond all-optical magnetization switching in GdFeCo microstructures
- Source :
- Nature Communications, 6, 1-6, Nature Communications, 6, pp. 1-6
- Publication Year :
- 2015
- Publisher :
- Springer Science and Business Media LLC, 2015.
-
Abstract
- Ultrafast magnetization reversal driven by femtosecond laser pulses has been shown to be a promising way to write information. Seeking to improve the recording density has raised intriguing fundamental questions about the feasibility of combining ultrafast temporal resolution with sub-wavelength spatial resolution for magnetic recording. Here we report on the experimental demonstration of nanoscale sub-100 ps all-optical magnetization switching, providing a path to sub-wavelength magnetic recording. Using computational methods, we reveal the feasibility of nanoscale magnetic switching even for an unfocused laser pulse. This effect is achieved by structuring the sample such that the laser pulse, via both refraction and interference, focuses onto a localized region of the structure, the position of which can be controlled by the structural design. Time-resolved photo-emission electron microscopy studies reveal that nanoscale magnetic switching employing such focusing can be pushed to the sub-100 ps regime.
- Subjects :
- Materials science
Physics::Optics
General Physics and Astronomy
Nanotechnology
02 engineering and technology
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
law.invention
Magnetization
law
Spectroscopy of Solids and Interfaces
0103 physical sciences
Thin film
010306 general physics
GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries)
Nanoscopic scale
Multidisciplinary
business.industry
General Chemistry
021001 nanoscience & nanotechnology
Laser
Pulse (physics)
Picosecond
Femtosecond
Optoelectronics
Inhouse research on structure dynamics and function of matter
0210 nano-technology
business
Ultrashort pulse
Subjects
Details
- ISSN :
- 20411723
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....f4a7d13895e4ba71eed8bb4d862fd778