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Abstract
The nonlinear optical properties of nickel oxide (NiO) nanoparticles were investigated using Z-scan technique with a fundamental nanosecond Nd:YAG laser. The nanoparticles were prepared using chemical precipitation method and its band-gap was varied by adopting different calcination temperature. We found an analytical result for the three-photon absorption coefficient inversely proportional to the band-gap based on the theory predicted from the wherret's equation for parabolic bands. The three-photon absorption coefficient and the extracted three-photon absorption cross-section were obtained to be 81.60 cm3/GW2 and 3.53 × 10-78 cm6 s2/photon2 at a calcination temperature of 400˚C.
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