Femtosecond single-electron diffraction

Lahme, Stefan; Kealhofer, Catherine; Krausz, Ferenc; Baum, Peter

Femtosecond single-electron diffraction

Dateien

Lahme_2-jki7ay73a8om7.pdfGröße: 2.16 MBDownloads: 261

Datum

2014

Autor:innen

Lahme, Stefan

Kealhofer, Catherine

Krausz, Ferenc

Baum, Peter

Open Access-Veröffentlichung

Open Access Gold

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Structural dynamics. 2014, 1(3), 034303. eISSN 2329-7778. Available under: doi: 10.1063/1.4884937

Zusammenfassung

Ultrafast electron diffraction allows the tracking of atomic motion in real time, but space charge effects within dense electron packets are a problem for temporal resolution. Here, we report on time-resolved pump-probe diffraction using femtosecond single-electron pulses that are free from intra-pulse Coulomb interactions over the entire trajectory from the source to the detector. Sufficient average electron current is achieved at repetition rates of hundreds of kHz. Thermal load on the sample is avoided by minimizing the pump-probe area and by maximizing heat diffusion. Time-resolved diffraction from fibrous graphite polycrystals reveals coherent acoustic phonons in a nanometer-thick grain ensemble with a signal-to-noise level comparable to conventional multi-electron experiments. These results demonstrate the feasibility of pump-probe diffraction in the single-electron regime, where simulations indicate compressibility of the pulses down to few-femtosecond and attosecond duration.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

LAHME, Stefan, Catherine KEALHOFER, Ferenc KRAUSZ, Peter BAUM, 2014. Femtosecond single-electron diffraction. In: Structural dynamics. 2014, 1(3), 034303. eISSN 2329-7778. Available under: doi: 10.1063/1.4884937

BibTex

@article{Lahme2014-05Femto-43273,
  year={2014},
  doi={10.1063/1.4884937},
  title={Femtosecond single-electron diffraction},
  number={3},
  volume={1},
  journal={Structural dynamics},
  author={Lahme, Stefan and Kealhofer, Catherine and Krausz, Ferenc and Baum, Peter},
  note={Article Number: 034303}
}

RDF

<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/server/rdf/resource/123456789/43273">
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-09-17T08:51:13Z</dc:date>
    <dc:creator>Baum, Peter</dc:creator>
    <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by/3.0/"/>
    <dc:contributor>Lahme, Stefan</dc:contributor>
    <dc:contributor>Baum, Peter</dc:contributor>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:creator>Krausz, Ferenc</dc:creator>
    <dcterms:abstract xml:lang="eng">Ultrafast electron diffraction allows the tracking of atomic motion in real time, but space charge effects within dense electron packets are a problem for temporal resolution. Here, we report on time-resolved pump-probe diffraction using femtosecond single-electron pulses that are free from intra-pulse Coulomb interactions over the entire trajectory from the source to the detector. Sufficient average electron current is achieved at repetition rates of hundreds of kHz. Thermal load on the sample is avoided by minimizing the pump-probe area and by maximizing heat diffusion. Time-resolved diffraction from fibrous graphite polycrystals reveals coherent acoustic phonons in a nanometer-thick grain ensemble with a signal-to-noise level comparable to conventional multi-electron experiments. These results demonstrate the feasibility of pump-probe diffraction in the single-electron regime, where simulations indicate compressibility of the pulses down to few-femtosecond and attosecond duration.</dcterms:abstract>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:creator>Lahme, Stefan</dc:creator>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-09-17T08:51:13Z</dcterms:available>
    <dc:rights>Attribution 3.0 Unported</dc:rights>
    <dc:contributor>Krausz, Ferenc</dc:contributor>
    <dc:language>eng</dc:language>
    <dc:creator>Kealhofer, Catherine</dc:creator>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/43273/1/Lahme_2-jki7ay73a8om7.pdf"/>
    <dc:contributor>Kealhofer, Catherine</dc:contributor>
    <dcterms:issued>2014-05</dcterms:issued>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:title>Femtosecond single-electron diffraction</dcterms:title>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/43273"/>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/43273/1/Lahme_2-jki7ay73a8om7.pdf"/>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Nein

Begutachtet

Ja