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首页> 外文会议>Liquid Crystals XI; Proceedings of SPIE-The International Society for Optical Engineering; vol.6654 >Tunable Refractive Index Materials with Metallic Nano-Spheres Dispersed in Organic Liquids
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Tunable Refractive Index Materials with Metallic Nano-Spheres Dispersed in Organic Liquids

机译：金属纳米球分散在有机液体中的可调谐折射率材料

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摘要

Metamaterials are of substantial current interest because they may exhibit unusual and/or configurable optical responses. We studied the optical properties of gold and silver nanoparticles dispersed in different organic liquids in the visible to near-IR. Calculation of the refractive indices of metallic nanospheres or metallic-coated silica spheres in liquid crystals show the possibility of tuning and varying the refractive index by reorientation of the liquid crystal molecules. Measurements of the refractive indices of gold nanoparticles in dodecane were experimentally studied by using spectroscopic ellipsometry and a reasonable agreement with the theoretical results based on Mie scattering was obtained. Finally, the effect of gold and silver nanospheres on the nonlinear absorption properties of an organic liquid (L34, a 4,4'-dialkyl phenyleneethynylene) was studied. The results suggest that metallic nanoparticles dispersed in a host organic fluids can be good materials for fabrication of low and tunable index materials in the visible to near-IR wavelength range, and for the enhancement of the nonlinear absorption of liquids used in switching applications.
机译：由于超材料可能表现出不寻常的和/或可配置的光学响应，因此它们具有当前的重大意义。我们研究了可见光到近红外光中分散在不同有机液体中的金和银纳米颗粒的光学特性。液晶中的金属纳米球或金属包覆的二氧化硅球的折射率的计算显示出通过液晶分子的重新取向来调节和改变折射率的可能性。利用椭圆偏振光谱法对金纳米颗粒在十二烷中的折射率进行了实验研究，与基于米氏散射的理论结果基本吻合。最后，研究了金和银纳米球对有机液体（L34，4,4'-二烷基亚苯基亚乙炔基）的非线性吸收特性的影响。结果表明，分散在主体有机流体中的金属纳米颗粒可以是制造可见光至近红外波长范围内的低折射率参数材料以及增强开关应用中液体非线性吸收的良好材料。

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