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    Measurement of the third-order nonlinear refractive index of vanadium oxide nanoscrolls

    Adams, Charles Hubert
    : https://etd.library.vanderbilt.edu/etd-12112012-220751
    http://hdl.handle.net/1803/15253
    : 2012-12-20

    Abstract

    Vanadium dioxide is a strongly correlated electronic material which undergoes a phase transition from a semiconducting to metallic state when illuminated with an intense electric field. This phase transition marks interest in using VO2 as an optical limiter In this work, the z-scan method is used to find the third order nonlinear index n2 of VOx nanoscrolls prepared via a sol-gel method and then suspended in a liquid. The nonlinear index is then compared to the third order nonlinear index of multi-wall carbon nanotubes (also suspended in a liquid), and gold nanoparticles implanted in glass. Both the VOx nanoscrolls and multi-wall carbon nanotubes have similar n2, while the gold nanoparticles exhibit a much larger nonlinear index.
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