GUILLET, Yannick; ABBAS, Allaoua; RAVAINE, Serge; AUDOIN, Bertrand

doi:10.1063/1.5085157

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GUILLET, Yannick

ABBAS, Allaoua

RAVAINE, Serge

Centre de Recherche Paul Pascal [CRPP]

Langue

Article de revue

Ce document a été publié dans

Applied Physics Letters. 2019-03-04, vol. 114, n° 9, p. 091904

American Institute of Physics

Résumé en anglais

The vibrational landscape of an250 nm-radius single gold nanoparticle dropped on a silica substrate is imaged with an ultrafast pump-probe experiment in a transient reflectivity configuration. A movie of the picosecond dynamics of the nanoparticle is recorded over 20 ns. Aspatially resolved analysis of the spectrum of the transient reflectivity is also achieved. In addition to the axial oscillation of the nanoparticledriven by the normal contact stiffness and to the breathing mode of the nanoparticle, ultrafast microscopy allows us to reveal higher orderacoustic eigenmodes otherwise hidden by the noise in single point measurements. These results are confirmed by calculations of the acousticeigenfrequencies of the nanoparticle. The shear component of the particle surface displacement associated with the higher order modes is ofstrong interest for probing the elasticity of the surrounding medium in the GHz to THz range< Réduire

Mots clés en anglais

Nanoparticle

URI

https://oskar-bordeaux.fr/handle/20.500.12278/76776

DOI

http://dx.doi.org/10.1063/1.5085157

Project ANR

Vibration GHz d'une nanoparticule unique : sonde d'élasticité locale à une échelle submicronique - ANR-11-JS09-0013

Origine

Importé de hal

Unités de recherche

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295