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Energy distribution curves of ultrafast laser-induced field emission and their implications for electron dynamics


Yanagisawa, H; Hengsberger, M; Leuenberger, D; Klöckner, M; Greber, T; Osterwalder, J; Hafner, C (2011). Energy distribution curves of ultrafast laser-induced field emission and their implications for electron dynamics. Physical Review Letters, 107(8):0867601.

Abstract

Energy distribution curves (EDCs) of laser-induced electron pulses from a tungsten tip have been measured as a function of tip voltage and laser power. Electron emission via tunneling through and/or excitation over the surface barrier from photo-excited nonequilibrium electron distributions are clearly observed. The spectral shapes largely vary with the emission processes and are strongly affected by electron dynamics. Simulations successfully reproduce the spectra, thus allowing direct insight into the involved electron dynamics and revealing the temporal tunability of electron emis- sion via the two experimental parameters. These results should be useful to optimize the pulse characteristics for many applications based on ultrafast laser-induced electron emission.

Abstract

Energy distribution curves (EDCs) of laser-induced electron pulses from a tungsten tip have been measured as a function of tip voltage and laser power. Electron emission via tunneling through and/or excitation over the surface barrier from photo-excited nonequilibrium electron distributions are clearly observed. The spectral shapes largely vary with the emission processes and are strongly affected by electron dynamics. Simulations successfully reproduce the spectra, thus allowing direct insight into the involved electron dynamics and revealing the temporal tunability of electron emis- sion via the two experimental parameters. These results should be useful to optimize the pulse characteristics for many applications based on ultrafast laser-induced electron emission.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:17 Aug 2011 11:58
Last Modified:05 Apr 2016 14:58
Publisher:American Physical Society
ISSN:0031-9007
Additional Information:PACS: 79.70.+q, 78.47.J-, 79.60.-i, 79.90.+b
Free access at:Related URL. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/PhysRevLett.107.087601
Related URLs:http://arxiv.org/abs/1103.4310

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