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.
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. [10.1016/j.photonics.2007.03.002]
Nonlinear optical absorption of zinc-phthalocyanines in polymeric matrix
LARCIPRETE, Maria Cristina;BELARDINI, ALESSANDRO;ALONZO, Massimo;LEAHU, GRIGORE;FAZIO, Eugenio;SIBILIA, Concetta;BERTOLOTTI, Mario
2007
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.