Tailored Hypersound Generation in Single Plasmonic Nanoantennas.
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Ultrashort laser pulses impinging on a plasmonic nanostructure trigger a highly dynamic scenario in the interplay of electronic relaxation with lattice vibrations, which can be experimentally probed via the generation of coherent phonons. In this Letter, we present studies of hypersound generation in the range of a few to tens of gigahertz on single gold plasmonic nanoantennas, which have additionally been subjected to predesigned mechanical constraints via silica bridges. Using these hybrid gold/silica nanoantennas, we demonstrate experimentally and via numerical simulations how mechanical constraints allow control over their vibrational mode spectrum. Degenerate pump-probe techniques with double modulation are performed in order to detect the small changes produced in the probe transmission by the mechanical oscillations of these single nanoantennas.
Date Issued
2016-01-27
Date Acceptance
2016-01-27
Citation
Nano Letters, 2016, 16 (2), pp.1428-1434
ISSN
1530-6992
Publisher
American Chemical Society
Start Page
1428
End Page
1434
Journal / Book Title
Nano Letters
Volume
16
Issue
2
Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.nanolett.5b04991
Subjects
Coherent acoustic phonon
gold-silica nanoantenna
hypersound
nanoresonator
pump−probe
Publication Status
Published