We realized and investigated films of zinc-phtalocyanines into poly (methylmethacrylate) (PMMA) for optical limiting applications. The ratio by weight of the compound to the host polymer was 0.083% and 0.15%. Linear optical characterization of films, performed by spectrophotometry, show a low degree of molecular aggregation of zinc-phtalocyanines in the polymeric matrix. Two different type of nonlinear optical investigation were performed separately on the obtained films. Measurements of nonlinear transmission were carried out using a ns Nd:Yag laser followed by OPO (532 nm) and a nonlinear response was observed. From the experimental data, the nonlinear absorption coefficient 0 was retrieved and found to be 29 and 43 cm/GW, respectively. The measurements of was also performed via the z-scan technique on the same films, using 100 fs pulses at 800 am. At this wavelength, the nonlinear absorption coefficient was evaluated to be 0.40 and 0.23 cm/GW. (C) 2007 Elsevier B.V. All rights reserved.
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|Titolo:||Nonlinear optical absorption of zinc-phthalocyanines in polymeric matrix|
|Data di pubblicazione:||2007|
|Citazione:||Nonlinear optical absorption of zinc-phthalocyanines in polymeric matrix / Larciprete, Maria Cristina; R., Ostuni; Belardini, Alessandro; Alonzo, Massimo; Leahu, Grigore; Fazio, Eugenio; Sibilia, Concetta; Bertolotti, Mario. - In: PHOTONICS AND NANOSTRUCTURES. - ISSN 1569-4410. - STAMPA. - 5:2-3(2007), pp. 73-78.|
|Appartiene alla tipologia:||01a Articolo in rivista|