Relative enhancement of ultrafast emission in gold nanorods

TitleRelative enhancement of ultrafast emission in gold nanorods
Publication TypeJournal Article
Year of Publication2003
AuthorsVarnavski, OP, Mohamed, MB, EL-Sayed, MA, Goodson III, T
JournalThe Journal of Physical Chemistry B
ISBN Number1520-6106

Time-resolved fluorescence spectroscopy has been employed to probe the ultrafast emission observed in gold nanospheres and nanorods. The decay of the emission was found to be ≤50 fs. The ultrafast emission from nanorods has been directly compared to that for nanospheres and the dispersion of the relative local field enhancement factor was obtained and compared with calculations. Measurements with both visible and ultraviolet excitations have been analyzed. These results give the first observation and analysis of the mechanism for the local field-enhanced ultrafast emission in gold nanorods and nanospheres.