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dc.contributor.authorTai, Po-Tseen_US
dc.contributor.authorYu, Pyngen_US
dc.contributor.authorTang, Jauen_US
dc.date.accessioned2014-12-08T15:11:33Z-
dc.date.available2014-12-08T15:11:33Z-
dc.date.issued2011-05-14en_US
dc.identifier.issn0021-9606en_US
dc.identifier.urihttp://dx.doi.org/10.1063/1.3590373en_US
dc.identifier.urihttp://hdl.handle.net/11536/8861-
dc.description.abstractIn this work we reported experimental measurements of ultrafast structural dynamics in metallic nanoprisms induced by a femtosecond laser pulse. The main focus of this study of anisotropic heating in nanoprisms is about laser fluence effects on photoexcitation of two planar coherent acoustic phonon modes, namely, the breathing mode and the totally symmetric mode. We presented a combined two-temperature model and 2-D Fermi-Pasta-Ulam model to explain both the dependence of the initial phases and the mode weight on the excitation power. Our transient optical absorption data for both the initial fast monotonic decay and the subsequent coherent acoustic oscillations clearly indicate the presence of anisotropic thermal expansion in nanoprisms. (C) 2011 American Institute of Physics. [doi:10.1063/1.3590373]en_US
dc.language.isoen_USen_US
dc.titlePhotoinduced multimode coherent acoustic phonons of metallic nanoprisms and the effects of shape-induced anisotropic electronic stressesen_US
dc.typeArticleen_US
dc.identifier.doi10.1063/1.3590373en_US
dc.identifier.journalJOURNAL OF CHEMICAL PHYSICSen_US
dc.citation.volume134en_US
dc.citation.issue18en_US
dc.citation.epageen_US
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentDepartment of Photonicsen_US
dc.identifier.wosnumberWOS:000290589900030-
dc.citation.woscount3-
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