温度变化环境中Au纳米球光学性质的研究

发布时间：2018-01-24 22:28

本文关键词： 光散射吸收效率介电函数 Mie理论金属纳米颗粒　出处：《光子学报》2017年06期 　论文类型：期刊论文

【摘要】：理论分析了贵金属纳米颗粒介电函数的尺寸及温度修正,考虑环境介质折射率的色散及随温度变化关系,计算了温度变化环境中Au纳米球的光学性质.结果表明,体相和纳米Au金属介电函数实部均随着温度升高而增大,而体相材料和纳米Au介电函数虚部表现出不同的温度特性;对于纳米球的光吸收效率,温度升高,纳米球的吸收峰峰值增大;对10~100nm的Au纳米球吸收效率的温度灵敏度分析表明,Au纳米球的光吸收效率温度灵敏度随粒径增大而减小.
[Abstract]:The size and temperature correction of dielectric function of noble metal nanoparticles are analyzed theoretically, and the dispersion of refractive index of ambient medium and the relation with temperature are considered. The optical properties of au nanospheres in temperature varying environment are calculated. The results show that both bulk phase and real part of dielectric function of au nanocrystalline increase with the increase of temperature. On the other hand, bulk materials and nanocrystalline au show different temperature characteristics in the imaginary part of dielectric function. For the optical absorption efficiency of the nanospheres, the peak value of the absorption peak of the nanospheres increases with the increase of temperature. The analysis of the temperature sensitivity of the au nanospheres at 100 nm shows that the temperature sensitivity of the au nanospheres decreases with the increase of the particle size.
【作者单位】：西安电子科技大学物理与光电工程学院;
【基金】：陕西省协同创新计划项目(No.2015XT65)资助~~
【分类号】：O614.123;TB383.1
【正文快照】： 0　引言近年来,基于贵金属纳米材料的光学性质,在提高光伏电池效率、传感、荧光增强、喇曼增强、生物光热治疗等领域有广泛研究及应用[1-5].贵金属纳米颗粒的光学性质和颗粒的材质、尺寸、形状、周围环境介质的折射率等因素有关[6-10].基于贵金属纳米颗粒的光吸收特性及光热效

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