Photoemission electron microscopy of localized surface plasmons in silver nanostructures at telecommunication wavelengths
Mårsell, Erik LU ; Witting Larsen, Esben LU ; Arnold, Cord LU ; Xu, Hongxing LU ; Mauritsson, Johan LU
and Mikkelsen, Anders
LU
(2015)
In Applied Physics Reviews
117(8).
- Abstract
- We image the field enhancement at Ag nanostructures using femtosecond laser pulses with a center wavelength of 1.55 mu m. Imaging is based on non-linear photoemission observed in a photoemission electron microscope (PEEM). The images are directly compared to ultra violet PEEM and scanning electron microscopy (SEM) imaging of the same structures. Further, we have carried out atomic scale scanning tunneling microscopy on the same type of Ag nanostructures and on the Au substrate. Measuring the photoelectron spectrum from individual Ag particles shows a larger contribution from higher order photoemission processes above the work function threshold than would be predicted by a fully perturbative model, consistent with recent results using... (More)
- We image the field enhancement at Ag nanostructures using femtosecond laser pulses with a center wavelength of 1.55 mu m. Imaging is based on non-linear photoemission observed in a photoemission electron microscope (PEEM). The images are directly compared to ultra violet PEEM and scanning electron microscopy (SEM) imaging of the same structures. Further, we have carried out atomic scale scanning tunneling microscopy on the same type of Ag nanostructures and on the Au substrate. Measuring the photoelectron spectrum from individual Ag particles shows a larger contribution from higher order photoemission processes above the work function threshold than would be predicted by a fully perturbative model, consistent with recent results using shorter wavelengths. Investigating a wide selection of both Ag nanoparticles and nanowires, field enhancement is observed from 30% of the Ag nanoparticles and from none of the nanowires. No laser-induced damage is observed of the nanostructures neither during the PEEM experiments nor in subsequent SEM analysis. By direct comparison of SEM and PEEM images of the same nanostructures, we can conclude that the field enhancement is independent of the average nanostructure size and shape. Instead, we propose that the variations in observed field enhancement could originate from the wedge interface between the substrate and particles electrically connected to the substrate. (C) 2015 AIP Publishing LLC. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5293794
- author
- Mårsell, Erik
LU
; Witting Larsen, Esben
LU
; Arnold, Cord
LU
; Xu, Hongxing
LU
; Mauritsson, Johan
LU
and Mikkelsen, Anders
LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Physics Reviews
- volume
- 117
- issue
- 8
- article number
- 083104
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000351132500004
- scopus:84923869774
- ISSN
- 1931-9401
- DOI
- 10.1063/1.4913310
- language
- English
- LU publication?
- yes
- id
- 0c10b514-435d-401a-820f-c77709291ecc (old id 5293794)
- date added to LUP
- 2016-04-01 10:45:41
- date last changed
- 2023-10-26 18:54:23
@article{0c10b514-435d-401a-820f-c77709291ecc,
abstract = {{We image the field enhancement at Ag nanostructures using femtosecond laser pulses with a center wavelength of 1.55 mu m. Imaging is based on non-linear photoemission observed in a photoemission electron microscope (PEEM). The images are directly compared to ultra violet PEEM and scanning electron microscopy (SEM) imaging of the same structures. Further, we have carried out atomic scale scanning tunneling microscopy on the same type of Ag nanostructures and on the Au substrate. Measuring the photoelectron spectrum from individual Ag particles shows a larger contribution from higher order photoemission processes above the work function threshold than would be predicted by a fully perturbative model, consistent with recent results using shorter wavelengths. Investigating a wide selection of both Ag nanoparticles and nanowires, field enhancement is observed from 30% of the Ag nanoparticles and from none of the nanowires. No laser-induced damage is observed of the nanostructures neither during the PEEM experiments nor in subsequent SEM analysis. By direct comparison of SEM and PEEM images of the same nanostructures, we can conclude that the field enhancement is independent of the average nanostructure size and shape. Instead, we propose that the variations in observed field enhancement could originate from the wedge interface between the substrate and particles electrically connected to the substrate. (C) 2015 AIP Publishing LLC.}},
author = {{Mårsell, Erik and Witting Larsen, Esben and Arnold, Cord and Xu, Hongxing and Mauritsson, Johan and Mikkelsen, Anders}},
issn = {{1931-9401}},
language = {{eng}},
number = {{8}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Applied Physics Reviews}},
title = {{Photoemission electron microscopy of localized surface plasmons in silver nanostructures at telecommunication wavelengths}},
url = {{http://dx.doi.org/10.1063/1.4913310}},
doi = {{10.1063/1.4913310}},
volume = {{117}},
year = {{2015}},
}