Total resonant absorption of light by plasmons on the nanoporous surface of a metal
Teperik T.V.1, Popov V.V.1, Garci a de Abajo F.J. 2
1Institute of Radio Engineering and Electronics (Saratov Division), Russian Academy of Sciences, Saratov, Russia
2Centro Mixto CSIC-UPV/EHU and Donostia International Physics Center, San Sebastian, Spain
Email: teperik@ire.san.ru
Выставление онлайн: 20 декабря 2004 г.
We have calculated light absorption spectra of planar metal surfaces with two-dimensional lattice of spherical nanovoids right beneath the surface. It is shown that nearly total absorption of light occurs at the plasma resonance in void lattice in the visible when the inter-void 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 surfaces can be effectively tuned by nano-engineering the spherical pores and they constitute a very attractive system for various applications in future submicron light technology. This work was supported by the Russian Foundation for Basic Research (grant N 02-02-81031) and the Russian Academy of Sciences Program "Low-Dimensional Quantum Nanostructures". T. V. T. acknowledges the support from the President of Russia through the grant for young scientists MK-2314.2003.02 and from the National Foundation for Promotion of Science. F. J. G. A. acknowledges help and support from the University of the Basque Country UPV/EHU (contract N 00206.215-13639/2001) and the Spanish Ministerio de Ciencia y Tecnologi a (contract N MAT2001-0946).
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