Study on UV-VIS characteristics of aluminum zinc oxide nanoparticles through manganese substitution using Wemple-Di Domenico Method and diffuse reflectance spectroscopy

In this research Manganese-substitution impact on linear and nonlinear (NL) optical properties of Aluminum-doped ZnO (AlZnO) Nanoparticles (NPs) are investigated. Utilizing measured data of reflectance acquired from the DRS, the higher-order NL optical characteristics of the provided NPs are examined. The maximum quantity of NL susceptibility χ 3 is measured to be around 3.945 × 10 −10 esu at wavelength λ = 520 nm and 7.467 × 10 −11 esu at wavelength λ = 530 nm for AlZnO and Manganese-substituted Aluminum-doped Zinc-Oxide (Mn-also) NPs, for particle sizes 14−67 nm and 11−54 nm, consecutively. Consequently, the synthesis method (sol–gel) which is used in this work concluded a decrease in particle size and different optical behavior especially in UV spectral regions during the substitution with Manganese in comparison with the AlZnO. This decrement assures that a decrease in the size of crystallite induces a decline in the χ 3 . The obtained optical parameters are red shifted with the Manganese substitution. Also, the NL absorption coefficient ( β c (m/W)) is enhanced in the UV range. The maximum of the NL absorption coefficient ( β c (m/W)), for AlZnO and Mn-AlZnO NPs, are determined (at λ = 250 nm) 2.24 × 10 −18 (m/W) and 5.76 × 10 −15 (m/W) respectively.