Asian Journal of Physics Vol 31, No 7 (2022) 715-720

Thermal nonlinear optical properties of iron oxide nanoparticles

Daniel Arranz1, 2, 3, Oscar Pérez-Benito2, Victor Pérez-Alonso2, Patricia de la Presa1, 3 and Rosa Weigand2
1Instituto de Magnetismo Aplicado Salvador Velayos (UCM-ADIF-CSIC), A6 km. 22.5 Las Rozas (Madrid)
2Dpto. de Óptica, 3Dpto. de Física de Materiales, Facultad de Ciencias Físicas,
Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain.

Dedicated to Prof Maria J Yzuel

Iron oxide nanoparticles (IONPs) of magnetite (d = 27 nm) and maghemite (d = 11 nm) have been synthesized using co-precipitation methods. The samples have been characterized by XRD, TEM and SQUID magnetometry. These IONPs are able to release heat under infrared laser radiation, which have interesting biomedical applications. The nonlinear Kerr index n2 of thermal origin was measured using the Z-scan technique with a continuous-wave He-Ne laser. The results show that magnetite water suspensions have a higher value of n2 than the maghemite suspensions. Also a parabolic lens model for the transmittance in the closed-aperture geometry provided better fits to the experimental results, than the standard and the aberrated lens models. © Anita Publications. All rights reserved.
Keywords: Z-scan, Thermal Kerr effect, Iron oxide nanoparticles.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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