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Controlling magnetism by ultrashort laser pulses: from fundamentals to nanoscale engineering

Controlling magnetism by ultrashort laser pulses: from fundamentals to nanoscale engineering

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BOSSINI, Davide, Theo RASING, 2016. Controlling magnetism by ultrashort laser pulses: from fundamentals to nanoscale engineering. Ultrafast Bandgap Photonics. Baltimore, Maryland, Apr 18, 2016 - Apr 20, 2016. In: RAFAILOV, Michael K., ed., Eric MAZUR, ed.. Ultrafast Bandgap Photonics. Bellingham, Washington:SPIE, 98351P. ISSN 0277-786X. eISSN 1996-756X. ISBN 978-1-5106-0076-8. Available under: doi: 10.1117/12.2225199

@inproceedings{Bossini2016Contr-53334, title={Controlling magnetism by ultrashort laser pulses: from fundamentals to nanoscale engineering}, year={2016}, doi={10.1117/12.2225199}, number={9835}, isbn={978-1-5106-0076-8}, issn={0277-786X}, address={Bellingham, Washington}, publisher={SPIE}, series={Proceedings of SPIE}, booktitle={Ultrafast Bandgap Photonics}, editor={Rafailov, Michael K. and Mazur, Eric}, author={Bossini, Davide and Rasing, Theo}, note={Article Number: 98351P} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/53334"> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dcterms:abstract xml:lang="eng">From the discovery of sub-picosecond demagnetization over a decade ago [1] to the recent demonstration of magnetization reversal by a single 40 femtosecond laser pulse [2], the manipulation of spins by ultra-short laser pulses has become a fundamentally challenging topic with a potentially high impact for future spintronics, data storage and manipulation and quantum computation [3]. It was realized that the femtosecond laser induced all-optical switching (AOS) as observed in ferrimagnets exploits the laser induced strongly non-equilibrium dynamics and the antiferromagnetic exchange interaction between their sublattices [4-6]. This opens the way to engineer new magnetic materials for AOS [7,8], though for real applications nanoscale control of inhomogeneities appears to be relevant [9]. Besides the intruiging technological implications of these observations, they broadened remarkably the frontiers of our fundamental knowledge of magnetic phenomena. The laser driven out-of-equilibrium states cannot be described in term of the well-established thermodynamical approach, which is based on the concepts of equilibrium and adiabatic transformations. Theoretical efforts, although in their infancy, have already demonstrated [5,6] that light-induced spin dynamics on the (sub)-picosecond time scale results in phenomena utterly forbidden in a thermodynamical framework. Another challenge is how to bring the optical manipulation of magnetic media to the required nanoscale. This is clearly a key element for the perspectives in terms of magnetic recording. In addition, it would allow to explore a novel regime of spin dynamics, since the investigation of magnets on the femtosecond time-scale and the nanometer length-scale simultaneously is unexplored. One experimental approach which may be successful makes use of wave-shaping techniques [10]. Recent results with engineered hybrid magnetic materials and nanofocusing via a plasmonic antenna showed the practical potential of AOS: the magnetization of domains as small as 50 nm was repeatedly reversed by a single laser pulse [11]. The process was fully deterministic, implying that each laser pulse totally reversed the magnetization of the domain in a reproducible way. Employing antennas provided another significant benefit, by decreasing the threshold laser energy required for the AOS to occur.</dcterms:abstract> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:contributor>Bossini, Davide</dc:contributor> <dc:creator>Rasing, Theo</dc:creator> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/53334"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-04-01T11:20:16Z</dcterms:available> <dcterms:title>Controlling magnetism by ultrashort laser pulses: from fundamentals to nanoscale engineering</dcterms:title> <dcterms:issued>2016</dcterms:issued> <dc:creator>Bossini, Davide</dc:creator> <dc:contributor>Rasing, Theo</dc:contributor> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:rights>terms-of-use</dc:rights> <dc:language>eng</dc:language> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-04-01T11:20:16Z</dc:date> <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/> </rdf:Description> </rdf:RDF>

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