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Using Z-scan technique to measure the nonlinear optical properties of PMMA/ZnO nanocomposites


Shanshool, Haider Mohammed and Yahaya, Muhammad and Mat Yunus, Wan Mahmood and Abdullah, Ibtisam Yahya (2016) Using Z-scan technique to measure the nonlinear optical properties of PMMA/ZnO nanocomposites. Jurnal Teknologi (Sciences and Engineering), 78 (3). pp. 33-38. ISSN 0127-9696; ESSN: 2180-3722


The study of nonlinear optical properties of polymer nanocomposites has been given increasing attention due its application in laser, communication and data storage technology. There is a need to enhance the understanding of all photonics technologies. In the current work, PMMA-ZnO nanocomposites as foils and as thin films have been successfully prepared. Casting method and spin coating were used to prepare them respectively. Nanocomposites were prepared by mixing ZnO nanoparticles with polymethyl methacrylate (PMMA) as the polymer matrix. Different contents of ZnO nanoparticles were used as the filler in the nanocomposites. The absorbance spectra of the samples were obtained. The linear absorption coefficient was calculated. The nonlinear refractive index and nonlinear absorption coefficient were investigated using a single beam Z-scan technique. A Q-switched Nd-YAG pulsed laser (532 nm, 7 ns, 5 Hz) was used as a light source. Both thin film’s and foil’s samples showed peak absorption at 375 nm and increasing absorption with ZnO nanoparticles concentration. The nonlinear refractive index was in the order of 10-11 cm2/W for thin film samples and 10-12 cm2 /W for foil’s samples with a negative sign. In contrast, the nonlinear absorption coefficient is in the order of 10-6 cm/W and 10-7 cm /W for thin film and foil respectively. The figures of merit W and T were calculated in order to evaluate the suitability of the samples as optical switching device .However; they unsatisfied the requirements of optical switching devices but they can be considered as an excellent candidate for optical limiting.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Publisher: Penerbit UTM Press
Keywords: Nanocomposite; Nonlinear absorption coefficient; Nonlinear refractive index; PMMA/ ZnO
Depositing User: Nabilah Mustapa
Date Deposited: 19 May 2016 05:27
Last Modified: 19 May 2016 05:27
URI: http://psasir.upm.edu.my/id/eprint/47368
Statistic Details: View Download Statistic

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