Jean, Cyril ; Belliard, Laurent ; Cornelius, Thomas W. ; Thomas, Olivier ; Pennec, Yan ; Cassinelli, Marco ; Toimil-Molares, Maria Eugenia ; Perrin, Bernard (2016)
Spatiotemporal imaging of the acoustic field emitted by a single copper nanowire.
In: Nano Letters, 16 (10)
doi: 10.1021/acs.nanolett.6b03260
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The monochromatic and geometrically anisotropic acoustic field generated by 400 and 120 nm diameter copper nanowires simply dropped on a 10 μm silicon membrane is investigated in transmission using three-dimensional time-resolved femtosecond pump–probe experiments. Two pump–probe time-resolved experiments are carried out at the same time on both sides of the silicon substrate. In reflection, the first radial breathing mode of the nanowire is excited and detected. In transmission, the longitudinal and shear waves are observed. The longitudinal signal is followed by a monochromatic component associated with the relaxation of the nanowire’s first radial breathing mode. Finite difference time domain (FDTD) simulations are performed and accurately reproduce the diffracted field. A shape anisotropy resulting from the large aspect ratio of the nanowire is detected in the acoustic field. The orientation of the underlying nanowires is thus acoustically deduced.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Jean, Cyril ; Belliard, Laurent ; Cornelius, Thomas W. ; Thomas, Olivier ; Pennec, Yan ; Cassinelli, Marco ; Toimil-Molares, Maria Eugenia ; Perrin, Bernard |
| Art des Eintrags: | Bibliographie |
| Titel: | Spatiotemporal imaging of the acoustic field emitted by a single copper nanowire |
| Sprache: | Englisch |
| Publikationsjahr: | 22 September 2016 |
| Verlag: | ACS Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nano Letters |
| Jahrgang/Volume einer Zeitschrift: | 16 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1021/acs.nanolett.6b03260 |
| Kurzbeschreibung (Abstract): | The monochromatic and geometrically anisotropic acoustic field generated by 400 and 120 nm diameter copper nanowires simply dropped on a 10 μm silicon membrane is investigated in transmission using three-dimensional time-resolved femtosecond pump–probe experiments. Two pump–probe time-resolved experiments are carried out at the same time on both sides of the silicon substrate. In reflection, the first radial breathing mode of the nanowire is excited and detected. In transmission, the longitudinal and shear waves are observed. The longitudinal signal is followed by a monochromatic component associated with the relaxation of the nanowire’s first radial breathing mode. Finite difference time domain (FDTD) simulations are performed and accurately reproduce the diffracted field. A shape anisotropy resulting from the large aspect ratio of the nanowire is detected in the acoustic field. The orientation of the underlying nanowires is thus acoustically deduced. |
| Freie Schlagworte: | nanowires, ultrafast pump−probe spectroscopy, acoustic phonons, acoustic transducers, suboptical diffraction limited acoustic |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien |
| Hinterlegungsdatum: | 13 Mär 2024 12:16 |
| Letzte Änderung: | 13 Mär 2024 12:16 |
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