Nonlinear optical properties of ZnO variants

Authors

  • Associate Prof. Dr. Rozalina Zakaria Photonics Research Centre (PRC), Department of Physics, Faculty of Science, Universiti Malaya

DOI:

https://doi.org/10.22452/mnij.vol1no2.4

Keywords:

ZnO, Ag, Nanoparticles and nonlinear optical properties

Abstract

Investigation on nonlinear optical properties of ZnO with Au-Ag NPs was done in this report using a femtosecond laser with a wavelength of 720 nm using Z-scan measurement. ZnO sample was prepared by a two-step process: seeding process via ultrasonic spray pyrolysis and growth process via hydrothermal methods, while ZnO with Au-Ag NPs was done by chemical reduction. ZnO shown saturable absorbance properties with nonlinear absorption coefficient, β = 1.63×10−6 cm/W, while ZnO deposited with Au-Ag NPs, shows reverse saturable absorption properties, for which ZnO Au NPs have the highest value of 5.60×10−6 cm/W, nonlinear refractive index response for pristine ZnO gave self-focusing effect with the value of a nonlinear refractive index, γ = 2.29×10−12 cm2/W. In contrast, the rest of ZnO with Au-Ag NPs gave the self-defocusing effect, with the Au NPs having the lowest response with γ = −5.79×10−12 cm2/W. This gives ZnO Au NPs have the highest third-order nonlinear susceptibility, χ(3) = 14.62×10−10 esu, which is an enhancement from pristine ZnO.

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Published

23-01-2022

How to Cite

Zakaria, R. (2022). Nonlinear optical properties of ZnO variants. Malaysian NANO-An International Journal, 1(2), 37–45. https://doi.org/10.22452/mnij.vol1no2.4