Yüksek M., Elmali A., Durmu M., Gul Yaglioglu H., Nver H., Nyokong T.
Department of Engineering Physics, Faculty of Engineering, Ankara University, 06100 Beevler, Ankara, Turkey; Department of Chemistry, Gebze Institute of Technology, Gebze, Kocaeli 41400, Turkey; Department of Physics, Faculty of Science, Ankara University, 06100 Beevler, Ankara, Turkey; Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
Yüksek, M., Department of Engineering Physics, Faculty of Engineering, Ankara University, 06100 Beevler, Ankara, Turkey; Elmali, A., Department of Engineering Physics, Faculty of Engineering, Ankara University, 06100 Beevler, Ankara, Turkey; Durmu, M., Department of Chemistry, Gebze Institute of Technology, Gebze, Kocaeli 41400, Turkey; Gul Yaglioglu, H., Department of Engineering Physics, Faculty of Engineering, Ankara University, 06100 Beevler, Ankara, Turkey; Nver, H., Department of Physics, Faculty of Science, Ankara University, 06100 Beevler, Ankara, Turkey; Nyokong, T., Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
The optical limiting characteristics of tetra-and octasubstituted gallium and indium phthalocyanine complexes have been studied by means of the open-aperture Z-scan technique with nanosecond pulses at 532nm. The nonlinear response demonstrated that all investigated compounds exhibited strong reverse saturable absorption for both solution and solid-state-based experiments. The results showed that the ratio of the excited to ground state absorption cross section κ and effective nonlinear absorption coefficient βeff are largely dependent on the linear absorption coefficient. All compounds in chloroform exhibited almost the same optical limiting performance at the same linear absorption coefficient. Pc/PMMA composite films display a much larger effective nonlinear absorption coefficient, lower ratio of the excited to ground state absorption cross section and lower saturation fluence for optical limiting when compared to the same Pc molecules in solution. All gallium and indium complexes of phthalocyanines are good candidates for optical limiting applications. © 2010 IOP Publishing Ltd.
Ground state absorption; Indium complexes; Linear absorption coefficient; Nanosecond pulse; Non-linear response; Nonlinear absorption coefficient; Nonlinear absorptions; Octasubstituted; Optical limiting; Optical limiting applications; Phthalocyanine complexes; Reverse saturable absorption; Saturation fluence; State-based; Z-scan technique; Composite films; Gallium; Ground state; Indium; Nitrogen compounds; Plastic films; Polymer films; Polymers; Absorption