BURGIN, Julien; LANGOT, P.; DEL FATTI, N.; VALLÉE, F.; HUANG, W.; EL-SAYED, M. A.

doi:10.1021/jp802365s

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BURGIN, Julien
Centre de physique moléculaire optique et hertzienne [CPMOH]

LANGOT, P.
Centre de physique moléculaire optique et hertzienne [CPMOH]

DEL FATTI, N.
Laboratoire de Spectrométrie Ionique et Moléculaire [LASIM]

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Journal of Physical Chemistry C. 2008-07-03, vol. 112, p. 11231

American Chemical Society

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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.< Réduire

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

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