Ultrafast Vibrations of Gold Nanorings
Artikel i vetenskaplig tidskrift, 2011
We investigate the vibrational modes of gold nanorings on a silica substrate with an ultrafast optical technique. By comparison with numerical simulations, we identify several resonances in the gigahertz range associated with axially symmetric deformations of the nanoring and substrate. We elucidate the corresponding mode shapes and find that the substrate plays an important role in determining the mode damping. This study demonstrates the need for a plasmonic nano-optics approach to understand the optical excitation and detection mechanisms for the vibrations of plasmonic nanostructures.
vibrations
plasmonics
laser
gigahertz
wave-guides
ultrafast
Nanostructure
modes
nanoparticles
raman-scattering
picosecond ultrasonics
arrays
silver
metal
ring
dark plasmons
coherent acoustic-oscillations
Författare
T. A. Kelf
Hokkaido University
Y. Tanaka
Hokkaido University
O. Matsuda
Hokkaido University
Elin Maria Kristina Larsson
Chalmers, Teknisk fysik, Kemisk fysik
Kompetenscentrum katalys (KCK)
D. S. Sutherland
Aarhus Universitet
O. B. Wright
Hokkaido University
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 11 9 3893-3898Ämneskategorier (SSIF 2011)
Annan teknik
DOI
10.1021/nl202045z