Nanogroove array on thin metallic film as planar lens with tunable focusing

Autor:	Wellems, L. David, Huang, Danhong, Leskova, T. A., Maradudin, A. A.
Rok vydání:	2012
Předmět:	Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physleta.2011.11.002
Popis:	Numerical results for the distributions of light transmitted through metallic planar lenses composed of symmetric nanogroove arrays on the surfaces of a gold film are presented and explained. Both the near- and far-field distributions of the intensity of light transmitted are calculated by using a Green's function formalism. Results for an optimal transverse focus based on a quadratic variation of groove width are obtained. Meanwhile, a significant dependence of the focal length on the wavelength of light incident from the air side through the gold film into a dielectric substrate is found for this detector configuration. Comment: 14 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1212.5122 Zobrazit plný text záznamu View this record from Arxiv