Field polarization and polarization charge distributions in plasmon resonant nanoparticles
Field polarization and polarization charge distributions in plasmon resonant nanoparticles
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DOI：
10.1088/1367-2630/2/1/327
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发表时间：
2000-11-03
影响因子：
3.3
通讯作者：
Schultz, S
中科院分区：
文献类型：
--
作者：
Kottmann, JP;Martin, OJF;Schultz, S
我们研究了在20 nm的尺寸范围内的小的二维银颗粒（纳米线）与椭圆形或三角形形状的等离子体共振。虽然椭圆形粒子只有两个共振，一个众所周知的事实，我们证明，三角形粒子显示出一个更复杂的行为，在一个广泛的波长范围内的几个共振。使用动画的场振幅和场极化，我们调查这些不同的共振的属性。与每个等离子体共振相关联的场分布可以与颗粒表面上的极化电荷有关。等离子体共振结构的设计与特定的属性，例如，纳米光学或表面增强拉曼散射的影响进行了讨论。
We study the plasmon resonances for small two-dimensional silver particles (nanowires) with elliptical or triangular shapes in the 20 nm size range. While the elliptical particle has only two resonances, a well known fact, we demonstrate that the triangular particle displays a much more complex behaviour with several resonances over a broad wavelength range. Using animations of the field amplitude and field polarization, we investigate the properties of these different resonances. The field distribution associated with each plasmon resonance can be related to the polarization charges on the surface of the particles. Implications for the design of plasmon resonant structures with specific properties, for example, for nano-optics or surface enhanced Raman scattering are discussed.