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Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips

A R Bainbridge, W A Bryan, William Bryan Orcid Logo

New Journal of Physics, Volume: 16, Issue: 10, Start page: 103031

Swansea University Author: William Bryan Orcid Logo

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DOI (Published version): 10.1088/1367-2630/16/10/103031

Abstract

A novel application of velocity-map imaging (VMI) is demonstrated, whereby the momentum distribution of photoelectrons ejected from a tungsten nanoscale metal tip (< 50 nm radius) is recorded following illumination with an ultrafast laser pulse. The electrostatic conditions in the VMI instrument...

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Published in: New Journal of Physics
Published: 2014
Online Access: http://iopscience.iop.org/1367-2630/16/10/103031
URI: https://cronfa.swan.ac.uk/Record/cronfa20244
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spelling 2019-08-08T11:14:20.9293419 v2 20244 2015-03-02 Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips 8765729ae362887eb6653857658f2342 0000-0002-2278-055X William Bryan William Bryan true false 2015-03-02 SPH A novel application of velocity-map imaging (VMI) is demonstrated, whereby the momentum distribution of photoelectrons ejected from a tungsten nanoscale metal tip (< 50 nm radius) is recorded following illumination with an ultrafast laser pulse. The electrostatic conditions in the VMI instrument are optimized through finite element modelling, taking into account a physically realistic geometry including all conductive elements in the vicinity of the electron trajectories. The instrument is calibrated by observing above threshold ionization in krypton gas, and simultaneous electron emission from this gas and a tungsten nanotip is presented, illustrating that the velocity mapping condition is maintained. Realizing photoelectron VMI for femtosecond laser illuminated nanoscale objects will have a significant impact on the emerging field of ultrafast nanoplasmonics and will influence the development of such devices as a source of coherent pulses of electrons with applications in time-resolved microscopy, holography and diffractive imaging. Journal Article New Journal of Physics 16 10 103031 velocity map imaging, nanotip, tunnel ionization, ultrafast photoelectron spectroscopy 20 10 2014 2014-10-20 10.1088/1367-2630/16/10/103031 http://iopscience.iop.org/1367-2630/16/10/103031 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University RCUK 2019-08-08T11:14:20.9293419 2015-03-02T13:33:58.0121051 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics A R Bainbridge 1 W A Bryan 2 William Bryan 0000-0002-2278-055X 3 0020244-623201640623PM.pdf NJP_16_10_103031.pdf 2016-06-23T16:06:23.3870000 Output 1236375 application/pdf Version of Record true 2016-06-23T16:06:23.3870000 Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (https://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI true
title Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
spellingShingle Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
William Bryan
title_short Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
title_full Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
title_fullStr Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
title_full_unstemmed Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
title_sort Velocity map imaging of femtosecond laser induced photoelectron emission from metal nanotips
author_id_str_mv 8765729ae362887eb6653857658f2342
author_id_fullname_str_mv 8765729ae362887eb6653857658f2342_***_William Bryan
author William Bryan
author2 A R Bainbridge
W A Bryan
William Bryan
format Journal article
container_title New Journal of Physics
container_volume 16
container_issue 10
container_start_page 103031
publishDate 2014
institution Swansea University
doi_str_mv 10.1088/1367-2630/16/10/103031
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://iopscience.iop.org/1367-2630/16/10/103031
document_store_str 1
active_str 0
description A novel application of velocity-map imaging (VMI) is demonstrated, whereby the momentum distribution of photoelectrons ejected from a tungsten nanoscale metal tip (< 50 nm radius) is recorded following illumination with an ultrafast laser pulse. The electrostatic conditions in the VMI instrument are optimized through finite element modelling, taking into account a physically realistic geometry including all conductive elements in the vicinity of the electron trajectories. The instrument is calibrated by observing above threshold ionization in krypton gas, and simultaneous electron emission from this gas and a tungsten nanotip is presented, illustrating that the velocity mapping condition is maintained. Realizing photoelectron VMI for femtosecond laser illuminated nanoscale objects will have a significant impact on the emerging field of ultrafast nanoplasmonics and will influence the development of such devices as a source of coherent pulses of electrons with applications in time-resolved microscopy, holography and diffractive imaging.
published_date 2014-10-20T03:23:51Z
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score 11.014224

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