Total resonant absorption of light by plasmons on the nanoporous surface of a metal
Total resonant absorption of light by plasmons on the nanoporous surface of a metal
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DOI：
10.1134/1.1853473
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发表时间：
2005
影响因子：
0.6
通讯作者：
T. V. Teperik;V. Popov;F. J. G. D. Abajo
中科院分区：
文献类型：
--
作者：
T. V. Teperik;V. Popov;F. J. G. D. Abajo
我们计算了平面金属表面的光吸收光谱，其表面下有一个球形纳米孔的二维晶格。结果表明，在可见范围内，当空隙间距和进入金属的空隙深度小于表面深度时，等离子体共振几乎完全吸收光，从而保证了空隙等离激元与外部光的最佳耦合。我们的结论是，这种类型的纳米多孔金属表面的吸收和局部场特性可以通过球形孔的纳米工程有效地调整，并且它们构成了一个非常有吸引力的系统，用于未来亚微米光技术的各种应用。
We have calculated light absorption spectra of planar metal surfaces with a two-dimensional lattice of spherical nanovoids just beneath the surface. It is shown that nearly total absorption of light occurs at the plasma resonance in a void lattice in the visible range when the intervoid spacing and the void deepening into the metal are thinner than the skin depth, which ensures optimal coupling of void plasmons to external light. We conclude that the absorption and local-field properties of this type of nanoporous metal surface can be effectively tuned through nanoengineering of the spherical pores and that they constitute a very attractive system for various applications in future submicron light technology.