Journal
PHYSICAL REVIEW B
Volume 86, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.140404
Keywords
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Funding
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- De Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- European Union (EU) Nano Sci-European Research Associates (ERA) project FENOMENA
- ERC [257280]
- EC FP7 [NMP3-SL-2008-214469, 214810, 281043]
- European Research Council (ERC) [257280] Funding Source: European Research Council (ERC)
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Employing magnetization-sensitive microscopy techniques, we address the light-induced magnetization dynamics of patterned samples of rare-earth transitionmetal alloys. We experimentally find that smaller structures require a lower energy density to undergo all-optical switching of the magnetization. With the aid of simulations we explain this reduction in terms of enhanced light absorption by interference of the light within the structure. This results in a decrease of about 60% in the energy densities required for all-optical switching compared with those in continuous thin films of the same alloy. Moreover, we envisage that an energy lower than 10 fJ should be sufficient to switch a 20 x 20 nm(2) structure.
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