Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/106364
Type: Artigo de periódico
Title: Two-photon Absorption Spectrum In Diazoaromatic Compounds
Author: Boni L.D.
Andrade A.A.
Yamaki S.B.
Misoguti L.
Zilio S.C.
Atvars T.D.Z.
Mendonca C.R.
Abstract: This Letter studies the degenerate two-photon absorption (2PA) spectra of three diazoaromatic compounds using Z-scan with fs-pulses. The 2PA spectra exhibit resonant enhancement of the nonlinearity as the excitation approaches the linear absorption. The absence of 2PA to the ππ* band is related to the weaker donor/acceptor groups, and lower symmetry of diazoaromatic compounds, in agreement with our semi-empirical calculations. The higher magnitude of the 2PA cross-section, in comparison with single azoaromatics, demonstrates the positive effect of increasing conjugation. The decrease of 2PA cross-section with temperature is attributed to thermally induced torsions, which decreases the effective conjugation of diazoaromatic molecules. © 2008 Elsevier B.V. All rights reserved.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.cplett.2008.08.063
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-52049120795&partnerID=40&md5=40344579143df1d54ab7566996df1f0d
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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