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  Fiber tip-based electron source

Casandruc, A., Kassier, G., Zia, H., Bücker, R., & Miller, R. J. D. (2015). Fiber tip-based electron source. Journal of Vacuum Science and Technology B, 33(3): 03C101. doi:10.1116/1.4902016.

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1.4902016.pdf (Verlagsversion), 2MB
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2015
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© American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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http://dx.doi.org/10.1116/1.4902016 (Verlagsversion)
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 Urheber:
Casandruc, Albert1, 2, Autor           
Kassier, Günther1, 2, Autor           
Zia, Haider1, 2, Autor           
Bücker, Robert1, 2, Autor           
Miller, R. J. Dwayne1, 2, 3, Autor           
Affiliations:
1Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              
2CFEL, Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              
3Departments of Chemistry and Physics, University of Toronto, Toronto, Ontario M5S 3H6, Canada, ou_persistent22              

Inhalt

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Schlagwörter: Field emission; Electric measurements; Electron emission; Gold; Metallic coatings
 Zusammenfassung: The authors report on the first experimental characterization of a fiber tip-based electron source, where electron emission can be triggered by both electric field and optical excitation. Our approach consists of coating the open aperture of a commercial 100 nm apex size near-field scanning optical microscopy fiber tip with a 10 nm thick tungsten (W) layer, which is back-illuminated by a 405 nm continuous-wave laser beam in the presence of an extraction electric field. Despite the very low optical transmission of the fiber due to the subwavelength aperture size, measurements show a clearly enhanced emission when photoexciting the W layer with respect to pure field emission. The emission response time is slower than the optical trigger time, suggesting that thermal effects are predominant in the studied regime. To back up this hypothesis, the authors fabricated a nanometric thermocouple probe based on a Pt/Au junction and measured the temporal response of the tip temperature. The measured switch-on time for the tip temperature is consistent with the switch-on time of the optically enhanced electron emission.

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Sprache(n): eng - English
 Datum: 2014-08-292014-10-302014-11-262015-05
 Publikationsstatus: Erschienen
 Seiten: 5
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1116/1.4902016
 Art des Abschluß: -

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Titel: Journal of Vacuum Science and Technology B
  Andere : JVST B
  Andere : J. Vac. Sci. Techn. B
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: New York : Published by AVS through the American Institute of Physics
Seiten: - Band / Heft: 33 (3) Artikelnummer: 03C101 Start- / Endseite: - Identifikator: ISSN: 0734-2101
CoNE: https://pure.mpg.de/cone/journals/resource/954928495416