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Microstructural and nonlinear optical properties of SiO2 and Al2O3 nanoparticles doped in polyurethane

Published online by Cambridge University Press:  05 May 2015

Marzieh Nadafan ,
Rasoul Malekfar  and
Zahra Dehghani
Marzieh Nadafan
Affiliation:
Department of Physics, Tarbiat Modares University, Tehran 14115–175, Iran
Rasoul Malekfar*
Affiliation:
Department of Physics, Tarbiat Modares University, Tehran 14115–175, Iran
Zahra Dehghani
Affiliation:
Department of Physics, University of Neyshabur, Neyshabur 9319774400, Iran
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Polyurethane open cell (PUOC) composites containing SiO2 and Al2O3 nanoparticles (NPs) were prepared. Scanning electron microscopy and Z-scan methods were used for observing porosity and detecting third-order nonlinear optical properties of related samples. Adding NPs into polymer matrix decreased the cell size and subsequently increased the porosity of samples. The nonlinear effects of samples were increased by adding 1 wt% of NPs into polymer in comparison with blanks. However, those features were decreased again through higher loading (up to 2.0 wt%) of NPs. The nonlinear refractive indices and nonlinear absorption coefficients of the synthesized samples were obtained in the order of 10−8 (cm2/W) with negative sign and 10−5 (cm/W), respectively. All the results suggest that the nonlinear coefficients of the synthesized samples can be controlled by NP contents in PUOC.

Keywords

polymernanoscaleoptical properties
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 11 , 14 June 2015 , pp. 1788 - 1796
Copyright
Copyright © Materials Research Society 2015 

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Footnotes

Contributing Editor: Winston Schoenfeld

References

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