Production of color centers in PMMA by ultrashort laser pulses

Production of color centers in PMMA by ultrashort laser pulses

Autor Samad, Ricardo Eigul Google Scholar
Courrol, Lilia Coronato Autor UNIFESP Google Scholar
Lugao, Adernar Benevolo Google Scholar
Freitas, Anderson Zanardi de Google Scholar
Vieira Junior, Nilson Dias Google Scholar
Instituição CNEN SP
Universidade Federal de São Paulo (UNIFESP)
Resumo We report here the creation of color centers in commercial, transparent PMMA samples by ultrashort: pulses from a Ti:Sapphire laser emitting at 800 nm, with spatial control. Although the 800 nm photon energy is not sufficient to ionize the polymer, the centers are created following a multiphotonic absorption that causes the ionization. We propose that the free electrons quivering motion on the pulse electric field displaces atoms from its equilibrium positions, creating free radicals and double bonds that coalesce into color centers. the absorption and emission spectra of the centers were measured, but a dose-like curve could not be built due to the presence of damages created along with the centers that: scatter the excitation and emission lights due to the commercial sample's poor optical quality. (C) 2009 Elsevier B.V. All rights reserved.
Palavra-chave Color centers
Ultrafast phenomena
PMMA
Idioma Inglês
Data de publicação 2010-03-01
Publicado em Radiation Physics and Chemistry. Oxford: Pergamon-Elsevier B.V., v. 79, n. 3, p. 355-357, 2010.
ISSN 0969-806X (Sherpa/Romeo, fator de impacto)
Publicador Elsevier B.V.
Extensão 355-357
Fonte http://dx.doi.org/10.1016/j.radphyschem.2009.08.017
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000274958200035
Endereço permanente http://repositorio.unifesp.br/handle/11600/32345

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