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Self-influence of a femtosecond laser beam upon ablation of Ag in liquids

Authors:	G.A.?Shafeev author-information" > author-information__contact u-icon-before" > mailto:shafeev@kapella.gpi.ru" title=" shafeev@kapella.gpi.ru" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,E.?Freysz,F.?Bozon-Verduraz

Affiliation:	(1) Wave Research Center, General Physics Institute of the Russian Academy of Sciences, 38, Vavilov Street, 119991 Moscow, Russia;(2) Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798, Université Bordeaux-1, 351, Cours de la Libération, 33405 Talence Cedex, France;(3) ITODYS, Université Paris-7, 2, Place Jussieu, 75251 Paris, Cedex 05, France

Abstract:	Formation of nanoparticles of either Au or Ag is reported under ablation of metallic targets exposed to radiation of a femtosecond Ti:sapphire laser (wavelength of 810 nm, pulse width of 120 fs) in either water or ethanol. Nanoparticles are characterized by UV-visible spectroscopy and transmission electron microscopy. Nanoparticles of Ag are several times smaller than those of Au at otherwise equal conditions. The effect is attributed to the self-influence of a laser beam via generation of the second harmonics of the laser radiation on Ag clusters and its good matching to the plasmon resonance of Ag. PACS 42.62.-b; 61.46.+w; 78.66.-w

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