Advanced

Nanoscale imaging of local few-femtosecond near-field dynamics within a single plasmonic nanoantenna.

Mårsell, Erik LU ; Losquin, Arthur LU ; Svärd, Robin LU ; Miranda, Miguel LU ; Guo, Chen LU ; Harth, Anne LU ; Lorek, Eleonora LU ; Mauritsson, Johan LU ; Arnold, Cord LU and Xu, Hongxing LU , et al. (2015) In Nano Letters 15(10). p.6601-6608
Abstract
The local enhancement of few-cycle laser pulses by plasmonic nanostructures opens up for spatiotemporal control of optical interactions on a nanometer and few-femtosecond scale. However, spatially resolved characterization of few-cycle plasmon dynamics poses a major challenge due to the extreme length and time scales involved. In this letter, we experimentally demonstrate local variations in the dynamics during the few strongest cycles of plasmon-enhanced fields within individual rice-shaped silver nanoparticles. This was done using 5.5 fs laser pulses in an interferometric time-resolved photoemission electron microscopy setup. The experiments are supported by finite-difference time-domain simulations of similar silver structures. The... (More)
The local enhancement of few-cycle laser pulses by plasmonic nanostructures opens up for spatiotemporal control of optical interactions on a nanometer and few-femtosecond scale. However, spatially resolved characterization of few-cycle plasmon dynamics poses a major challenge due to the extreme length and time scales involved. In this letter, we experimentally demonstrate local variations in the dynamics during the few strongest cycles of plasmon-enhanced fields within individual rice-shaped silver nanoparticles. This was done using 5.5 fs laser pulses in an interferometric time-resolved photoemission electron microscopy setup. The experiments are supported by finite-difference time-domain simulations of similar silver structures. The observed differences in the field dynamics across a single particle do not reflect differences in plasmon resonance frequency or dephasing time. They instead arise from a combination of retardation effects and the coherent superposition between multiple plasmon modes of the particle, inherent to a few-cycle pulse excitation. The ability to detect and predict local variations in the few-femtosecond time evolution of multi-mode coherent plasmon excitations in rationally synthesized nanoparticles can be used in the tailoring of nanostructures for ultrafast and nonlinear plasmonics. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
15
issue
10
pages
6601 - 6608
publisher
The American Chemical Society
external identifiers
  • pmid:26375959
  • wos:000363003100047
  • scopus:84944339340
ISSN
1530-6992
DOI
10.1021/acs.nanolett.5b02363
language
English
LU publication?
yes
id
0a0cdca4-ab0d-4516-833d-5bc56769357c (old id 8038988)
date added to LUP
2015-10-28 21:11:53
date last changed
2017-11-12 03:07:40
@article{0a0cdca4-ab0d-4516-833d-5bc56769357c,
  abstract     = {The local enhancement of few-cycle laser pulses by plasmonic nanostructures opens up for spatiotemporal control of optical interactions on a nanometer and few-femtosecond scale. However, spatially resolved characterization of few-cycle plasmon dynamics poses a major challenge due to the extreme length and time scales involved. In this letter, we experimentally demonstrate local variations in the dynamics during the few strongest cycles of plasmon-enhanced fields within individual rice-shaped silver nanoparticles. This was done using 5.5 fs laser pulses in an interferometric time-resolved photoemission electron microscopy setup. The experiments are supported by finite-difference time-domain simulations of similar silver structures. The observed differences in the field dynamics across a single particle do not reflect differences in plasmon resonance frequency or dephasing time. They instead arise from a combination of retardation effects and the coherent superposition between multiple plasmon modes of the particle, inherent to a few-cycle pulse excitation. The ability to detect and predict local variations in the few-femtosecond time evolution of multi-mode coherent plasmon excitations in rationally synthesized nanoparticles can be used in the tailoring of nanostructures for ultrafast and nonlinear plasmonics.},
  author       = {Mårsell, Erik and Losquin, Arthur and Svärd, Robin and Miranda, Miguel and Guo, Chen and Harth, Anne and Lorek, Eleonora and Mauritsson, Johan and Arnold, Cord and Xu, Hongxing and L'Huillier, Anne and Mikkelsen, Anders},
  issn         = {1530-6992},
  language     = {eng},
  number       = {10},
  pages        = {6601--6608},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Nanoscale imaging of local few-femtosecond near-field dynamics within a single plasmonic nanoantenna.},
  url          = {http://dx.doi.org/10.1021/acs.nanolett.5b02363},
  volume       = {15},
  year         = {2015},
}