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.
metal
laser
Nanostructure
nanoparticles
ultrafast
silver
wave-guides
picosecond ultrasonics
gigahertz
coherent acoustic-oscillations
dark plasmons
vibrations
modes
ring
raman-scattering
arrays
plasmonics
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 University
O. B. Wright
Hokkaido University
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 11 9 3893-3898Subject Categories
Other Engineering and Technologies
DOI
10.1021/nl202045z