Near infrared nonlinear refractive index dispersion of metallic and semiconducting single-wall carbon nanotube colloids
Near infrared nonlinear refractive index dispersion of metallic and semiconducting single-wall carbon nanotube colloids
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DOI：
10.1016/j.carbon.2014.06.008
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发表时间：
2014-10
期刊：
影响因子：
10.9
通讯作者：
A. C. Brandão-Silva;Rogério M.A. Lima;C. Fantini;A. J. Jesus-Silva;M. Alencar;J. Hickmann;Rishabh Jain;M. Strano;E. Fonseca
中科院分区：
文献类型：
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作者：
A. C. Brandão-Silva;Rogério M.A. Lima;C. Fantini;A. J. Jesus-Silva;M. Alencar;J. Hickmann;Rishabh Jain;M. Strano;E. Fonseca
研究了含金属和半导体富集单壁碳纳米管的不同胶体体系的三阶非线性光学性质。采用热管理z扫描技术测量了胶体体系的非线性折射率（n2）和吸收系数（β）。得到了两种胶体在755 ~ 825 nm范围内的色散曲线，表明在800 nm激光调谐时，非线性折射率有较大的增加。在该波长范围内，胶体的非线性吸收系数小于8.5 × 10−10cm/W。对所获得的性能数据进行了分析，表明这些系统是全光开关应用的理想材料。
Third-order nonlinear optical properties of different colloidal systems containing metallic and semiconducting enriched single wall carbon nanotubes have been investigated. Thermally managed Z-scan technique was performed to measure the nonlinear refractive index (n2) and estimate the absorption coefficient (β) of the colloidal systems. Then2dispersion curve was obtained for both colloids in the range of 755–825 nm, showing a considerable increase on the nonlinear refractive index for laser tuned at 800 nm. The measurements also showed that the colloids nonlinear absorption coefficients were smaller than 8.5 × 10−10cm/W in this wavelength range. Analysis of the obtained figures of merit indicates that these systems are promising materials for all-optical switching applications.