Author(s)

Zainab S. Sadik, Dhia H. Al-Amiedy, Amal F. Jaffar

Department of Physics, College of Science for Women, University of Baghdad, Baghdad, Iraq.
Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq.
Ministry of High Education & Scientific Research, Foundation of Technical Education, Institute of Medical Technology, Mansour, Iraq.

In the present work, z-scan technique was used to study the nonlinear properties, represented by nonlinear refractive index and nonlinear absorption coefficient for Coumarin 450 (C₄₅₀) doped PMMA as a function of concentration for two different solvents. The results show change of the effect from self-focusing to self-defocusing in closed aperture z-can (or change of the effect from two photon absorption to saturable absorption in open aperture z-scan), when the sample dissolved in low viscosity and more polar solvent

Nonlinear Optics; Solvent Effect; Z-Scan Technique

Z. S. Sadik, D. H. Al-Amiedy and A. F. Jaffar, "Third Order Optical Nonlinearities of C₄₅₀ Doped Polymer Thin Film Investigated by the Z-Scan," Advances in Materials Physics and Chemistry, Vol. 2 No. 1, 2012, pp. 43-49. doi: 10.4236/ampc.2012.21007.