Nonlinear Optical Behavior of Transparent Nanohybrids of Nanocrystalline TiO2 in Poly(methyl methacrylate) Prepared by In Situ Sol-Gel Polymerization Technique

A.H. Yuwono; J.M. Xue; J. Wang; H.I. Elim; Wei Ji; Yuan Yuan Li; T.J. White

doi:10.4028/www.scientific.net/JMNM.23.367

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Nonlinear Optical Behavior of Transparent Nanohybrids of Nanocrystalline TiO₂ in Poly(methyl methacrylate) Prepared by In Situ Sol-Gel Polymerization Technique

Abstract:

Nanohybrid thin films consisting of nanocrystalline TiO2 particles in poly(methyl methacrylate)(PMMA) were successfully synthesized by in-situ sol-gel and polymerization assisted by spin coating. Using titanium isoproproxide (Ti-iP), methyl methacrylate (MMA) and 3-(trimethoxysily)propyl methacrylate (MSMA) as the starting materials, nanohybrids containing up to 60% Ti-iP in PMMA were realized. The resulting nanohybrid thin films coated on quartz substrates are optically transparent and demonstrate nonlinear optical behaviour, where their nonlinear absorption increases with the loading of Ti-iP in PMMA, as confirmed by Z-scan measurements. Using pump-probe technique, these thin films are shown to exhibit an ultrafast relaxation time of ~1.5 picosecond.

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Periodical:

Journal of Metastable and Nanocrystalline Materials (Volume 23)

Pages:

367-370

DOI:

https://doi.org/10.4028/www.scientific.net/JMNM.23.367

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Online since:

January 2005

Authors:

A.H. Yuwono, J.M. Xue, J. Wang, H.I. Elim, Wei Ji, Yuan Yuan Li, T.J. White

Keywords:

Nanohybrid of TiO₂-PMMA , Non-Linear Optical Behavior, Ultrafast Electronic Nonlinearity

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