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- W2242005998 abstract "In this paper we present the nonlinear optical characterization of Au/Pd nanoparticles inorder to obtain the nonlinear refractive indices using the Z-scan technique. The experimentswere performed using a 514 nm laser beam Ar +, with 14Hz of modulation frequency, asexcitation source. By using a lens the excitation beam was focused to a small spot and thesample was moved across the focal region along the z axis by a motorized translationstage. Seven samples with different concentration ratio of Au/Pd nanoparticles wereprepared by simultaneous reduction of gold and palladium ions in presence of poly (Nvinyl-2-pirrolidone) (PVP) using ethanol as a reducing agent. In this work, we report theapplication of the Z-scan technique, to generate optical transmission of laser light as afunction of the z position for solutions containing bimetallic nanoparticles of Au (core) / Pd(shell) with average sizes ranging from 3 to 5 nm. The magnitude of the obtainednonlinear refractive index was in the order of 10-7 to 10-8 cm 2/W. Our results show that thenonlinear refractive index has a nonlinear behavior when the (Au/Pd) ratio was increased." @default.
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- W2242005998 date "2013-01-01" @default.
- W2242005998 modified "2023-10-02" @default.
- W2242005998 title "Z-scan technique for nonlinear optical characterization of bimetallic Au/Pd nanoparticles" @default.
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