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Photodiode-based time zero determination for ultrafast electron microscopy

Pump-probe experiments in ultrafast electron microscopy require temporal overlap between the pump and probe pulses. Accurate measurements of the time delay between them allows for the determination of the time zero, the moment in time where both pulses perfectly overlap. In this work, we present the...

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Autores principales: Kempers, S. T., Borrelli, S., Kieft, E. R., van Doorn, H. A., Mutsaers, P. H. A., Luiten, O. J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10629968/
https://www.ncbi.nlm.nih.gov/pubmed/37941992
http://dx.doi.org/10.1063/4.0000218
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author Kempers, S. T.
Borrelli, S.
Kieft, E. R.
van Doorn, H. A.
Mutsaers, P. H. A.
Luiten, O. J.
author_facet Kempers, S. T.
Borrelli, S.
Kieft, E. R.
van Doorn, H. A.
Mutsaers, P. H. A.
Luiten, O. J.
author_sort Kempers, S. T.
collection PubMed
description Pump-probe experiments in ultrafast electron microscopy require temporal overlap between the pump and probe pulses. Accurate measurements of the time delay between them allows for the determination of the time zero, the moment in time where both pulses perfectly overlap. In this work, we present the use of a photodiode-based alignment method for these time zero measurements. The cheap and easy-to-use device consists of a photodiode in a sample holder and enables us to temporally align individual, single-electron pulses with femtosecond laser pulses. In a first device, a temporal resolution of 24 ps is obtained, limited by the photodiode design. Future work will utilize a smaller photodiode with a lower capacitance, which will increase the temporal resolution and add spatial resolution as well. This upgrade will bring the method toward the micrometer and picosecond spatiotemporal resolution.
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spelling pubmed-106299682023-11-08 Photodiode-based time zero determination for ultrafast electron microscopy Kempers, S. T. Borrelli, S. Kieft, E. R. van Doorn, H. A. Mutsaers, P. H. A. Luiten, O. J. Struct Dyn ARTICLES Pump-probe experiments in ultrafast electron microscopy require temporal overlap between the pump and probe pulses. Accurate measurements of the time delay between them allows for the determination of the time zero, the moment in time where both pulses perfectly overlap. In this work, we present the use of a photodiode-based alignment method for these time zero measurements. The cheap and easy-to-use device consists of a photodiode in a sample holder and enables us to temporally align individual, single-electron pulses with femtosecond laser pulses. In a first device, a temporal resolution of 24 ps is obtained, limited by the photodiode design. Future work will utilize a smaller photodiode with a lower capacitance, which will increase the temporal resolution and add spatial resolution as well. This upgrade will bring the method toward the micrometer and picosecond spatiotemporal resolution. American Crystallographic Association 2023-11-06 /pmc/articles/PMC10629968/ /pubmed/37941992 http://dx.doi.org/10.1063/4.0000218 Text en © 2023 Author(s). https://creativecommons.org/licenses/by/4.0/All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle ARTICLES
Kempers, S. T.
Borrelli, S.
Kieft, E. R.
van Doorn, H. A.
Mutsaers, P. H. A.
Luiten, O. J.
Photodiode-based time zero determination for ultrafast electron microscopy
title Photodiode-based time zero determination for ultrafast electron microscopy
title_full Photodiode-based time zero determination for ultrafast electron microscopy
title_fullStr Photodiode-based time zero determination for ultrafast electron microscopy
title_full_unstemmed Photodiode-based time zero determination for ultrafast electron microscopy
title_short Photodiode-based time zero determination for ultrafast electron microscopy
title_sort photodiode-based time zero determination for ultrafast electron microscopy
topic ARTICLES
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10629968/
https://www.ncbi.nlm.nih.gov/pubmed/37941992
http://dx.doi.org/10.1063/4.0000218
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