Ultrafast Vibrations of Gold Nanorings
Journal article, 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
Author
T. A. Kelf
Hokkaido University
Y. Tanaka
Hokkaido University
O. Matsuda
Hokkaido University
Elin Maria Kristina Larsson
Chalmers, Applied Physics, Chemical Physics
Competence Centre for Catalysis (KCK)
D. S. Sutherland
Aarhus Universitet
O. B. Wright
Hokkaido University
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 11 9 3893-3898Subject Categories (SSIF 2011)
Other Engineering and Technologies
DOI
10.1021/nl202045z