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High-accuracy Z-scan measurements of the optical non-linearity of bis-phthalocyanines (Articolo in rivista)

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High-accuracy Z-scan measurements of the optical non-linearity of bis-phthalocyanines (Articolo in rivista) (literal)

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Gnoli A., Paoletti A. M., Pennesi G., Rossi G., Righini M. (2007)
High-accuracy Z-scan measurements of the optical non-linearity of bis-phthalocyanines
in Journal of porphyrins and phthalocyanines
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ISM - CNR ISC - CNR Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy (literal)

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High-accuracy Z-scan measurements of the optical non-linearity of bis-phthalocyanines (literal)

Abstract

The usage of a modified Z-scan setup for the study of optical nonlinearities of bisphthalocyanines is discussed. The setup leads to the selection of the pure electronic nonlinear optical response purged from other possible contributions such as molecular reorientation or thermal effects. The described experimental method is based on the capability to extract the instantaneous nonlinear response of the sample, by monitoring and managing cumulative effects and taking full advantage of the large number of probing laser pulses. This kind of approach has been applied on some sandwich-type metal bis-phthalocyanines confirming its potential for an in-depth analysis of the nonlinear response of such molecules. First results on titanium, niobium and tin bis-phthalocyanines provide information on the role of the conjugation length in their nonlinear optical response. (literal)

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