Morphology dependent ultrafast electron dynamics in ultrathin gold films

Jesús Garduño-Mejía; Michael P. Higlett; Stephen R. Meech

doi:10.1016/j.susc.2007.06.078

Morphology dependent ultrafast electron dynamics in ultrathin gold films

Jesús Garduño-Mejía, Michael P. Higlett, Stephen R. Meech^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Ultrafast electron dynamics in 5 nm thick gold films have been investigated as a function of film morphology. The transient reflectivity data reveal a sub-100 fs rise time and a complex relaxation profile on the picosecond timescale. These data are discussed in terms of a modified two-temperature model of the electron dynamics accounting for the initial relaxation of the non-thermal population. The electron-phonon coupling may be sensitive to film morphology. The possible origin of this behaviour is discussed and results are placed in the context of enhanced photochemistry on thin metal films.

Original language	English
Pages (from-to)	3125-3130
Number of pages	6
Journal	Surface Science
Volume	602
Issue number	20
DOIs	https://doi.org/10.1016/j.susc.2007.06.078
Publication status	Published - 15 Oct 2008
Externally published	Yes

Bibliographical note

Funding Information:
We are grateful to the EPSRC for financial support and MPH thanks them for the award of a studentship. We are also grateful to Dr Andrew Kirby and Prof. J. Morris of the Institute for Food Research Norwich for measuring the AFM images.

Keywords

Enhanced photochemistry
Gold
Hot electron
Plasmon
Thin film
Ultrafast

Access to Document

10.1016/j.susc.2007.06.078

Cite this

@article{d84fe48ed7984f63a518c2f0eddbe25e,

title = "Morphology dependent ultrafast electron dynamics in ultrathin gold films",

abstract = "Ultrafast electron dynamics in 5 nm thick gold films have been investigated as a function of film morphology. The transient reflectivity data reveal a sub-100 fs rise time and a complex relaxation profile on the picosecond timescale. These data are discussed in terms of a modified two-temperature model of the electron dynamics accounting for the initial relaxation of the non-thermal population. The electron-phonon coupling may be sensitive to film morphology. The possible origin of this behaviour is discussed and results are placed in the context of enhanced photochemistry on thin metal films.",

keywords = "Enhanced photochemistry, Gold, Hot electron, Plasmon, Thin film, Ultrafast",

author = "Jes{\'u}s Gardu{\~n}o-Mej{\'i}a and Higlett, {Michael P.} and Meech, {Stephen R.}",

note = "Funding Information: We are grateful to the EPSRC for financial support and MPH thanks them for the award of a studentship. We are also grateful to Dr Andrew Kirby and Prof. J. Morris of the Institute for Food Research Norwich for measuring the AFM images.",

year = "2008",

month = oct,

day = "15",

doi = "10.1016/j.susc.2007.06.078",

language = "English",

volume = "602",

pages = "3125--3130",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "20",

}

TY - JOUR

T1 - Morphology dependent ultrafast electron dynamics in ultrathin gold films

AU - Garduño-Mejía, Jesús

AU - Higlett, Michael P.

AU - Meech, Stephen R.

N1 - Funding Information: We are grateful to the EPSRC for financial support and MPH thanks them for the award of a studentship. We are also grateful to Dr Andrew Kirby and Prof. J. Morris of the Institute for Food Research Norwich for measuring the AFM images.

PY - 2008/10/15

Y1 - 2008/10/15

N2 - Ultrafast electron dynamics in 5 nm thick gold films have been investigated as a function of film morphology. The transient reflectivity data reveal a sub-100 fs rise time and a complex relaxation profile on the picosecond timescale. These data are discussed in terms of a modified two-temperature model of the electron dynamics accounting for the initial relaxation of the non-thermal population. The electron-phonon coupling may be sensitive to film morphology. The possible origin of this behaviour is discussed and results are placed in the context of enhanced photochemistry on thin metal films.

AB - Ultrafast electron dynamics in 5 nm thick gold films have been investigated as a function of film morphology. The transient reflectivity data reveal a sub-100 fs rise time and a complex relaxation profile on the picosecond timescale. These data are discussed in terms of a modified two-temperature model of the electron dynamics accounting for the initial relaxation of the non-thermal population. The electron-phonon coupling may be sensitive to film morphology. The possible origin of this behaviour is discussed and results are placed in the context of enhanced photochemistry on thin metal films.

KW - Enhanced photochemistry

KW - Gold

KW - Hot electron

KW - Plasmon

KW - Thin film

KW - Ultrafast

UR - http://www.scopus.com/inward/record.url?scp=53549084590&partnerID=8YFLogxK

U2 - 10.1016/j.susc.2007.06.078

DO - 10.1016/j.susc.2007.06.078

M3 - Article

AN - SCOPUS:53549084590

SN - 0039-6028

VL - 602

SP - 3125

EP - 3130

JO - Surface Science

JF - Surface Science

IS - 20

ER -

Morphology dependent ultrafast electron dynamics in ultrathin gold films

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this