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 3893-3898

Ämneskategorier

Annan teknik

DOI

10.1021/nl202045z