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Nonlinear optical properties of poly (methyl methacrylate) thin films doped with Bixa Orellana dye

Natural dyes with highly delocalized ????-electron systems are considered as promising organic materials for nonlinear optical applications. Among these dyes, Bixa Orellana dye with extended ????-electron delo- calization is one of the most attractive dyes. Bixa Orellana dye-doped Poly(methyl methacrylate) (PMMA) thin films were prepared through spin coating process for linear and nonlinear optical properties investi- gation. Atomic force microscopy (AFM) was used to evaluate the roughness of the thin films. The optical constants n and k were evaluated by ellipsometric spectroscopy. The refractive index had a maximum of about 1.456 at 508.5, 523.79 and 511.9 nm, while the maximum of k varies from 0.070 to 0.080 with the thickness. The third order nonlinear optical properties of the hybrid Bixa Orellana dye-PMMA polymer were investigated under 30 ps laser irradiation at 1064 nm with a repetition rate of 10 Hz. In particular the third-order nonlinear susceptibility has been determined by means of the Maker Fringes technique. The nonlinear third order susceptibility was found to be 1.00 × 10?21 m2 V?2 or 0.72 × 10?13 esu. Our studies provide concrete evidence that the hybrid-PMMA composites of Bixa dye are prospective candidates for nonlinear material applications

Auteur(s) : S. Zongo, A.P. Kerasidou, B.T. Sone, A. Diallo, P. Mthunzi, K. Iliopoulos, M. Nkosi, M. Maaza, B. Sahraoui
Pages : 72-77
Année de publication : 2015
Revue : Applied Surface Science
N° de volume : 340
Type : Article
Mise en ligne par : DIALLO Abdoulaye