| Tailoring optical properties of TiO2 in silica glass for limiting applications |
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| 作者姓名： | S.Divya Indu Sebastian V.P.N.Nampoori P.Radhakrishnan A.Mujeeb |
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| 基金项目： | Project supported by the Department of Science&Technology of India |
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| 摘 要： | We present the linear and nonlinear optical studies on TiO2-SiO2 nanocomposites with varying compositions. Opti- cal band gap of the material is found to vary with the amount of SiO2 in the composite. The phenomenon of two-photon absorption （TPA） in TiO2/SiO2 nanocomposites has been studied using open aperture Z-scan technique. The nanocom- posites show better nonlinear optical properties than pure TiO2, which can be attributed to the surface states and weak dielectric confinement of TiO2 nanoparticles by SiO2 matrix. The nanocomposites are thermally treated and similar studies are performed. The anatase form of TiO2 in the nanocomposites shows superior properties relative to the amorphous and rutile counterpart. The involved mechanism is explained by rendering the dominant role played by the excitons in the TiO2 nanoparticles.
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| 关 键 词： | TiO2-SiO2 光学性能 石英玻璃 应用程序 非线性光学性质 纳米复合材料 TiO2 SiO2 裁缝 |
Tailoring optical properties of TiO_2 in silica glass for limiting applications |
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| S.Divya,Indu Sebastian,V.P.N.Nampoori,P.Radhakrishnan,A.Mujeeb.Tailoring optical properties of TiO2 in silica glass for limiting applications[J].Chinese Physics B,2014(3):303-307. |
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| Authors: | SDivya Indu Sebastian VPNNampoori PRadhakrishnan AMujeeb |
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| Institution: | International |
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| Abstract: | reverse saturable absorption （RSA）, optical limiting, excitons |
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| Keywords: | reverse saturable absorption(RSA) optical limiting excitons |
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