Time-resolved investigation of the acoustic vibration of a single gold nanoprism pair

TitleTime-resolved investigation of the acoustic vibration of a single gold nanoprism pair
Publication TypeJournal Article
Year of Publication2008
AuthorsBurgin, J, Langot, P, Del Fatti, N, Vallee, F, Huang, WY, EL-Sayed, MA
JournalJournal of Physical Chemistry C
Volume112
Pagination11231-11235
Date PublishedJul
ISBN Number1932-7447
Accession NumberWOS:000257927100026
Abstract

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.

DOI10.1021/jp802365s