Acoustic waves undetectable by transient reflectivity measurements

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HE, Chuan, Oliver RISTOW, Martin GROSSMANN, Delia BRICK, Yuning GUO, Martin SCHUBERT, Mike HETTICH, Vitalyi GUSEV, Thomas DEKORSY, 2017. Acoustic waves undetectable by transient reflectivity measurements. In: Physical Review B. 95(18), 184302. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.95.184302

@article{He2017-05-11Acous-39415, title={Acoustic waves undetectable by transient reflectivity measurements}, year={2017}, doi={10.1103/PhysRevB.95.184302}, number={18}, volume={95}, issn={2469-9950}, journal={Physical Review B}, author={He, Chuan and Ristow, Oliver and Grossmann, Martin and Brick, Delia and Guo, Yuning and Schubert, Martin and Hettich, Mike and Gusev, Vitalyi and Dekorsy, Thomas}, note={Article Number: 184302} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:creator>Gusev, Vitalyi</dc:creator> <dc:contributor>Hettich, Mike</dc:contributor> <dc:creator>Dekorsy, Thomas</dc:creator> <dcterms:available rdf:datatype="">2017-06-27T08:40:59Z</dcterms:available> <dc:creator>Schubert, Martin</dc:creator> <dcterms:isPartOf rdf:resource=""/> <dc:creator>He, Chuan</dc:creator> <dc:creator>Brick, Delia</dc:creator> <dcterms:abstract xml:lang="eng">A free-standing GaAs membrane is investigated by pump-probe reflectivity measurements with femtosecond laser pulses of 400-nm wavelength. It is found that the detected wide spectrum of laser-generated coherent strain waves in the membrane does not contain a specific hypersonic frequency. Theoretical analysis reveals that this effect is related to zero sensitivity of the acousto-optic detection at a particular frequency defined by the wavelength of the probe laser pulse on the mechanical free surface of the GaAs membrane. We predict that a similar behavior is expected in Si and Au membranes and films, indicating that the presence of zeros in the spectral transformation function of acousto-optic conversion is a rather general phenomenon in picosecond ultrasonics that has so far been neglected.</dcterms:abstract> <dc:creator>Grossmann, Martin</dc:creator> <dc:contributor>Schubert, Martin</dc:contributor> <dc:contributor>Guo, Yuning</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:creator>Guo, Yuning</dc:creator> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:contributor>Dekorsy, Thomas</dc:contributor> <bibo:uri rdf:resource=""/> <dcterms:issued>2017-05-11</dcterms:issued> <dc:creator>Hettich, Mike</dc:creator> <dspace:isPartOfCollection rdf:resource=""/> <dc:language>eng</dc:language> <dc:contributor>Gusev, Vitalyi</dc:contributor> <dc:contributor>Grossmann, Martin</dc:contributor> <dc:contributor>He, Chuan</dc:contributor> <dc:creator>Ristow, Oliver</dc:creator> <dcterms:title>Acoustic waves undetectable by transient reflectivity measurements</dcterms:title> <dc:contributor>Brick, Delia</dc:contributor> <dc:contributor>Ristow, Oliver</dc:contributor> <dc:date rdf:datatype="">2017-06-27T08:40:59Z</dc:date> </rdf:Description> </rdf:RDF>

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