纳米线
材料科学
等离子体子
半径
消光(光学矿物学)
纳米尺度
壳体(结构)
芯(光纤)
光学
偏心率(行为)
光电子学
纳米技术
复合材料
物理
计算机科学
计算机安全
法学
政治学
作者
Bin Sun,Yibo Yang,Bo Wu,Chongdan Ren,Shuai Kang,Yangjun Li,Jianqiang Liu
标识
DOI:10.1016/j.optcom.2016.06.058
摘要
We simulate and analyze the influence of nonlocal effects on the optical properties of thin metal hollow nanowires by finite element method. Nonlocal effects in hollow nanowires with both nm-sized overall volume and a tiny metal shell are considerable for extinction cross section but more for field enhancement, resulting in nonlocal plasmonic modes excited. Then, we show the dependence of extinction effects of a hollow super-nanowire on its parameters, including the metal shell thickness, the average radius and the optical constant of the hollow core. We find that nonlocal quadrupolar mode is very sensitive to the thickness of metal layer but with great stability as increasing the hollow nanowire dimension or changing the hollow core. Furthermore, the eccentricity of the hollow nanowire brings out new physical phenomena, such as nanofocusing and multimodes. The proposed structure promises a great of applications in nanoscale, such as designing nanoplasmonic antenna, sensing and nonlinear optics, etc.
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