MULTIPOLAR RESPONSE OF SMALL METALLIC SPHERES - NONLOCAL THEORY
MULTIPOLAR RESPONSE OF SMALL METALLIC SPHERES - NONLOCAL THEORY
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DOI：
10.1103/physrevb.35.3722
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发表时间：
1987-03-15
影响因子：
3.7
通讯作者：
CLARO, F
中科院分区：
文献类型：
--
作者：
FUCHS, R;CLARO, F
使用非局域介电函数研究小金属球的多极响应。给出了使用流体动力学模型和 Lindhard-Mermin 模型获得的结果，并将其与局部 Drude 模型给出的结果进行了比较。我们发现低频和极阶 l< l c 下多极极化率的虚部增强，其中 l c 是截止阶数，对应于电子-空穴对连续体高波矢量边缘的激发。计算了两个非常接近的球体的吸收系数，并讨论了非定域性对多极吸收峰的数量和位置的影响。
The multipolar response of a small metallic sphere is studied with use of a nonlocal dielectric function. Results obtained with the hydrodynamic and Lindhard-Mermin models are presented and compared to those given by the local Drude model. We find an enhancement of the imaginary part of the multipole polarizabilities at low frequencies and pole order l< l c, where l c is a cutoff order that corresponds to excitations at the high-wave-vector edge of the electron-hole pair continuum. The absorption coefficient for two very close spheres is calculated and the effect of nonlocality on the number and position of the multipolar absorption peaks is discussed.