Laser-induced electron emission from a tungsten nanotip: identifying above threshold photoemission using energy-resolved laser power dependencies

Abstract : We present an experiment studying the interaction of a strongly focused 25 fs laser pulse with a tungsten nanotip, investigating the different regimes of laser-induced electron emission. We study the dependence of the electron yield with respect to the static electric field applied to the tip. Photoelectron spectra are recorded using a retarding field spectrometer and peaks separated by the photon energy are observed with a 45% contrast. They are a clear signature of above threshold photoemission (ATP), and are confirmed by extensive spectrally resolved studies of the laser power dependence. Understanding these mechanisms opens the route to control experiment in the strong-field regime on nanoscale objects.
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Article dans une revue
Journal of Modern Optics, Taylor & Francis, 2014, 61 (10), pp.833-838. 〈10.1080/09500340.2013.846432〉
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https://hal.archives-ouvertes.fr/hal-00908778
Contributeur : Nicolas Elefantis <>
Soumis le : lundi 25 novembre 2013 - 11:55:11
Dernière modification le : lundi 9 octobre 2017 - 16:35:01

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Mina Bionta, Benoît Chalopin, Jean-Philippe Champeaux, Stéphane Faure, A. Masseboeuf, et al.. Laser-induced electron emission from a tungsten nanotip: identifying above threshold photoemission using energy-resolved laser power dependencies. Journal of Modern Optics, Taylor & Francis, 2014, 61 (10), pp.833-838. 〈10.1080/09500340.2013.846432〉. 〈hal-00908778〉

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