Surface plasmon resonances of arbitrarily shaped nanometallic structures in the small-screening-length limit
Surface plasmon resonances of arbitrarily shaped nanometallic structures in the small-screening-length limit
复制标题
小筛选长度限制下任意形状纳米金属结构的表面等离子体共振
DOI：
10.1098/rspa.2016.0258
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
R. Craster
中科院分区：
文献类型：
--
作者：
Ory Schnitzer;V. Giannini;S. Maier;R. Craster
根据流体动力学Drude模型，金属纳米结构的表面等离子体共振蓝移是由于金属的电子气的非局域响应。表征非局部效应的屏蔽长度通常相对于金属结构的整体尺寸较小，这使我们能够使用匹配的渐近展开来导出粗粒度的非局部描述;然后开发了用于任意形状的纳米结构的蓝移的微扰理论。非局部性的影响并不总是一个扰动，我们提出了一个详细的分析的“键合”模式的二聚体几乎接触纳米线的领导阶本征频率和本征模式分布被证明是一个重整化的预测假设一个本地金属介电常数。
According to the hydrodynamic Drude model, surface plasmon resonances of metallic nanostructures blueshift owing to the non-local response of the metal’s electron gas. The screening length characterizing the non-local effect is often small relative to the overall dimensions of the metallic structure, which enables us to derive a coarse-grained non-local description using matched asymptotic expansions; a perturbation theory for the blueshifts of arbitrary-shaped nanometallic structures is then developed. The effect of non-locality is not always a perturbation and we present a detailed analysis of the ‘bonding’ modes of a dimer of nearly touching nanowires where the leading-order eigenfrequencies and eigenmode distributions are shown to be a renormalization of those predicted assuming a local metal permittivity.
影响因子：
16.6
作者：
Toscano, Giuseppe;Straubel, Jakob;Wubs, Martijn
通讯作者：
Wubs, Martijn