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Article Dans Une Revue Journal of Physical Chemistry C Année : 2008

Time-Resolved Investigation of the Acoustic Vibration of a Single Gold Nanoprism Pair

Résumé

The acoustic vibration of single gold nanoprism pairs on a glass substrate has been investigated in the time-domain combining a spatial modulation spectroscopy microscope with a high-sensitivity femtosecond pump−probe setup. Three modes were observed and ascribed to two in-plane and one out-of-plane vibration of the nanoprisms forming the pair, in agreement with a theoretical analysis. The periods of the two former modes with similar nature show weak (about 10%) and well correlated pair to pair fluctuations that can be unambiguously ascribed to variation of the prism geometry. In contrast, strong fluctuations, by almost a factor of 6, of the mode damping are evidenced with no correlation with their period. This indicates large variations of the prism-substrate coupling, providing a unique way for its local investigation.

Dates et versions

hal-00338823 , version 1 (14-11-2008)

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Julien Burgin, P. Langot, N. del Fatti, F. Vallée, W. Huang, et al.. Time-Resolved Investigation of the Acoustic Vibration of a Single Gold Nanoprism Pair. Journal of Physical Chemistry C, 2008, 112, pp.11231. ⟨10.1021/jp802365s⟩. ⟨hal-00338823⟩
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