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Title: An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode

Abstract

We experimentally and numerically investigate the performance of an advanced ultrafast electron source, based on two-photon photoemission from a tungsten needle cathode incorporated in an electron microscope gun geometry. Emission properties are characterized as a function of the electrostatic gun settings, and operating conditions leading to laser-triggered electron beams of very low emittance (below 20 nm mrad) are identified. The results highlight the excellent suitability of optically driven nano-cathodes for the further development of ultrafast transmission electron microscopy.

Authors:
; ; ;  [1]
  1. 4th Physical Institute, Solids and Nanostructures, University of Göttingen, Göttingen 37077 (Germany)
Publication Date:
OSTI Identifier:
22492884
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATHODES; ELECTRON BEAMS; ELECTRON MICROSCOPES; ELECTRON SOURCES; GEOMETRY; LASERS; PERFORMANCE; PHOTOEMISSION; PHOTONS; TRANSMISSION ELECTRON MICROSCOPY; TUNGSTEN

Citation Formats

Bormann, Reiner, Strauch, Stefanie, Schäfer, Sascha, and Ropers, Claus. An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode. United States: N. p., 2015. Web. doi:10.1063/1.4934681.
Bormann, Reiner, Strauch, Stefanie, Schäfer, Sascha, & Ropers, Claus. An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode. United States. https://doi.org/10.1063/1.4934681
Bormann, Reiner, Strauch, Stefanie, Schäfer, Sascha, and Ropers, Claus. 2015. "An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode". United States. https://doi.org/10.1063/1.4934681.
@article{osti_22492884,
title = {An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode},
author = {Bormann, Reiner and Strauch, Stefanie and Schäfer, Sascha and Ropers, Claus},
abstractNote = {We experimentally and numerically investigate the performance of an advanced ultrafast electron source, based on two-photon photoemission from a tungsten needle cathode incorporated in an electron microscope gun geometry. Emission properties are characterized as a function of the electrostatic gun settings, and operating conditions leading to laser-triggered electron beams of very low emittance (below 20 nm mrad) are identified. The results highlight the excellent suitability of optically driven nano-cathodes for the further development of ultrafast transmission electron microscopy.},
doi = {10.1063/1.4934681},
url = {https://www.osti.gov/biblio/22492884}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 118,
place = {United States},
year = {Sat Nov 07 00:00:00 EST 2015},
month = {Sat Nov 07 00:00:00 EST 2015}
}