Kottmann J, Martin O, Smith D, Schultz S
Opt Express. 2000 May 22;6(11):213-9. doi: 10.1364/oe.6.000213.
We study the plasmon resonances of 10 (nm)--100 (nm) two-dimensional metal particles with a non-regular shape. Movies illustrate the spectral response of such particles in the optical range. Contrary to particles with a simple shape (cylinder, ellipse) non-regular particles exhibit many distinct resonances over a large spectral range. At resonance frequencies, extremely large enhancements of the electromagnetic fields occur near the surface of the particle, with amplitudes several hundred-fold that of the incident field. Implications of these strong and localized fields for nano-optics and surface enhanced Raman scattering (SERS) are also discussed.
我们研究了尺寸为10纳米至100纳米的非规则形状二维金属颗粒的等离子体共振。视频展示了此类颗粒在光学范围内的光谱响应。与具有简单形状（圆柱体、椭圆体）的颗粒不同，非规则颗粒在很大的光谱范围内呈现出许多不同的共振。在共振频率处，颗粒表面附近的电磁场会出现极大增强，其幅度是入射场的数百倍。我们还讨论了这些强局域场在纳米光学和表面增强拉曼散射（SERS）方面的意义。
