Nonlinear optical properties of natural laccaic acid dye studied using Z-scan technique

作者：Zongo S^*; Sanusi K; Britton J; Mthunzi P; Nyokong T; Maaza M; Sahraoui B

来源：Optical Materials, 2015, 46: 270-275.

DOI：10.1016/j.optmat.2015.04.031

• Z-scan
• NLO
• Multiphoton absorption
• Third-order nonlinear susceptibility
• Optical limiting
• Natural laccaic acid dye

We have investigated the nonlinear optical properties, including the optical limiting behaviour for five different concentrations of laccaic acid dye in solution and a thin film obtained through doping in poly (methyl methacrylate) (PMNIA) polymer. The experiments were performed by using single beam Z-scan technique at 532 nm with 10 ns, 10 Hz Nd:YAG laser pulses excitation. From the open-aperture Z-scan data, we derived that the laccaic dye samples exhibit strong two photon absorption (2PA). The nonlinear refractive index was determined through the closed aperture Z-scan data. The estimated absorption coefficient beta(2), nonlinear refractive index n(2) and second order hyperpolarizability gamma were found to be of the order of 10(-10) m/W, 10(-9) esu and 10(-32) esu, respectively. The Z-scan study reveals that the natural laccaic acid dye emerges as a promising material for third order nonlinear optical devices application.

• 出版日期2015-8