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Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging

A. R. Bainbridge, C. W. Barlow Myers, W. A. Bryan, William Bryan Orcid Logo

Structural Dynamics, Volume: 3, Issue: 2, Start page: 023612

Swansea University Author: William Bryan Orcid Logo

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DOI (Published version): 10.1063/1.4947098

Abstract

Femtosecond electron microscopy produces real-space images of matter in a series ofultrafast snapshots. Pulses of electrons self-disperse under space-charge broadening,so without compression, the ideal operation mode is a single electron per pulse. Here,we demonstrate femtosecond single-electron poi...

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Published in: Structural Dynamics
ISSN: 2329-7778
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa27343
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spelling 2020-06-25T17:00:04.5387112 v2 27343 2016-04-20 Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging 8765729ae362887eb6653857658f2342 0000-0002-2278-055X William Bryan William Bryan true false 2016-04-20 SPH Femtosecond electron microscopy produces real-space images of matter in a series ofultrafast snapshots. Pulses of electrons self-disperse under space-charge broadening,so without compression, the ideal operation mode is a single electron per pulse. Here,we demonstrate femtosecond single-electron point projection microscopy (fs-ePPM)in a laser-pump fs-e-probe configuration. The electrons have an energy of only150 eV and take tens of picoseconds to propagate to the object under study.Nonetheless, we achieve a temporal resolution with a standard deviation of 114 fs(equivalent to a full-width at half-maximum of 269 +/- 40 fs) combined with a spatialresolution of 100 nm, applied to a localized region of charge at the apex of a nanoscalemetal tip induced by 30 fs 800 nm laser pulses at 50 kHz. These observations demonstratereal-space imaging of reversible processes, such as tracking charge distributions,is feasible whilst maintaining femtosecond resolution. Our findings could find applicationas a characterization method, which, depending on geometry, could resolve tensof femtoseconds and tens of nanometres. Dynamically imaging electric and magneticfields and charge distributions on sub-micron length scales opens new avenues ofultrafast dynamics. Furthermore, through the use of active compression, such pulsesare an ideal seed for few-femtosecond to attosecond imaging applications which willaccess sub-optical cycle processes in nanoplasmonics. Journal Article Structural Dynamics 3 2 023612 2329-7778 femtosecond electron microscopy, nanoscale dynamic imaging, ultrafast electron microscopy, single electron pulses 20 4 2016 2016-04-20 10.1063/1.4947098 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2020-06-25T17:00:04.5387112 2016-04-20T17:36:52.7127985 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics A. R. Bainbridge 1 C. W. Barlow Myers 2 W. A. Bryan 3 William Bryan 0000-0002-2278-055X 4 0027343-02072018153039.pdf BainbridgeFemtosecondFew2016.pdf 2018-07-02T15:30:39.4670000 Output 4115691 application/pdf Version of Record true 2018-07-02T00:00:00.0000000 licensed under a Creative Commons Attribution 3.0 Unported License true eng
title Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
spellingShingle Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
William Bryan
title_short Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
title_full Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
title_fullStr Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
title_full_unstemmed Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
title_sort Femtosecond few- to single-electron point-projection microscopy for nanoscale dynamic imaging
author_id_str_mv 8765729ae362887eb6653857658f2342
author_id_fullname_str_mv 8765729ae362887eb6653857658f2342_***_William Bryan
author William Bryan
author2 A. R. Bainbridge
C. W. Barlow Myers
W. A. Bryan
William Bryan
format Journal article
container_title Structural Dynamics
container_volume 3
container_issue 2
container_start_page 023612
publishDate 2016
institution Swansea University
issn 2329-7778
doi_str_mv 10.1063/1.4947098
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
document_store_str 1
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description Femtosecond electron microscopy produces real-space images of matter in a series ofultrafast snapshots. Pulses of electrons self-disperse under space-charge broadening,so without compression, the ideal operation mode is a single electron per pulse. Here,we demonstrate femtosecond single-electron point projection microscopy (fs-ePPM)in a laser-pump fs-e-probe configuration. The electrons have an energy of only150 eV and take tens of picoseconds to propagate to the object under study.Nonetheless, we achieve a temporal resolution with a standard deviation of 114 fs(equivalent to a full-width at half-maximum of 269 +/- 40 fs) combined with a spatialresolution of 100 nm, applied to a localized region of charge at the apex of a nanoscalemetal tip induced by 30 fs 800 nm laser pulses at 50 kHz. These observations demonstratereal-space imaging of reversible processes, such as tracking charge distributions,is feasible whilst maintaining femtosecond resolution. Our findings could find applicationas a characterization method, which, depending on geometry, could resolve tensof femtoseconds and tens of nanometres. Dynamically imaging electric and magneticfields and charge distributions on sub-micron length scales opens new avenues ofultrafast dynamics. Furthermore, through the use of active compression, such pulsesare an ideal seed for few-femtosecond to attosecond imaging applications which willaccess sub-optical cycle processes in nanoplasmonics.
published_date 2016-04-20T03:33:07Z
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