TITLE:
Third Order Optical Nonlinearities of C450 Doped Polymer Thin Film Investigated by the Z-Scan
AUTHORS:
Zainab S. Sadik, Dhia H. Al-Amiedy, Amal F. Jaffar
KEYWORDS:
Nonlinear Optics; Solvent Effect; Z-Scan Technique
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.2 No.1,
March
19,
2012
ABSTRACT: 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