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Enhanced photoemission from laser-excited plasmonic nano-objects in periodic arrays
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SYSNO ASEP 0470447 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Enhanced photoemission from laser-excited plasmonic nano-objects in periodic arrays Author(s) Fedorov, N. (FR)
Geoffroy, G. (FR)
Duchateau, G. (FR)
Štolcová, L. (CZ)
Proška, J. (CZ)
Novotný, F. (CZ)
Domonkos, Mária (FZU-D) RID
Jouin, H. (FR)
Martin, P. (FR)
Raynaud, M. (FR)Article number 315301 Source Title Journal of Physics-Condensed Matter. - : Institute of Physics Publishing - ISSN 0953-8984
Roč. 28, č. 31 (2016), s. 1-15Number of pages 15 s. Language eng - English Country GB - United Kingdom Keywords photoemission ; laser excitation ; surface plasmon ; plasmonics Subject RIV BH - Optics, Masers, Lasers R&D Projects GBP108/12/G108 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000378325200004 EID SCOPUS 84976340311 DOI 10.1088/0953-8984/28/31/315301 Annotation The process of photoelectron emission from gold surfaces covered with objects that are organized in the form of a periodic array is addressed in the short laser pulse regime at moderate intensities and for various laser wavelengths. The emission spectrum from a gold single crystal measured under the same conditions is used for reference. The comparison of the photo-emission yield and the energy of the ejected electrons with their counterparts from the (more simple) reference system shows that the periodic conditions imposed on the target surface drastically enhance both quantities. In addition to the standard mechanism of Coulomb explosion, a second mechanism comes into play, driven by surface plasmon excitation. This can be clearly demonstrated by varying the laser wavelength. Despite the fact that the incident laser intensity is as low, such a structured target permits generating electrons with energies as high as 300 eV. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
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