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Enhanced photoemission from laser-excited plasmonic nano-objects in periodic arrays
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SYSNO ASEP 0470447 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Enhanced photoemission from laser-excited plasmonic nano-objects in periodic arrays Tvůrce(i) 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)Číslo článku 315301 Zdroj.dok. Journal of Physics-Condensed Matter. - : Institute of Physics Publishing - ISSN 0953-8984
Roč. 28, č. 31 (2016), s. 1-15Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova photoemission ; laser excitation ; surface plasmon ; plasmonics Vědní obor RIV BH - Optika, masery a lasery CEP GBP108/12/G108 GA ČR - Grantová agentura ČR Institucionální podpora FZU-D - RVO:68378271 UT WOS 000378325200004 EID SCOPUS 84976340311 DOI 10.1088/0953-8984/28/31/315301 Anotace 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. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2017
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