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

DOI10.1016/J.PHYSLETA.2011.11.002zbMATH Open1255.78004arXiv1212.5122OpenAlexW2082638656MaRDI QIDQ1933063

L. David Wellems, A. A. Maradudin, T. A. Leskova, Danhong Huang

Publication date: 22 January 2013

Published in: Physics Letters. A (Search for Journal in Brave)

Abstract: 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.

Full work available at URL: https://arxiv.org/abs/1212.5122

Mathematics Subject Classification ID

Waves and radiation in optics and electromagnetic theory (78A40) Electron optics (78A15) Fundamental solutions, Green's function methods, etc. for initial value and initial-boundary value problems involving PDEs (65M80)

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