Plasmonic lenses with long focal lengths
Paper in proceeding, 2012

We report on recent progress made in the development of plasmonic nanolenses. These lenses exhibit intensity transmittance close to 80%, focal lengths equal to one or more wavelengths, and foci with full-widths at halfmaximum close to the diffraction limit. We consider lenses in the form of (i) a silver layer with no hole on the optical axis and double-sided concentric corrugations, (ii) a silver layer with no hole on the axis and single-sided corrugations, and (iii) a lens composed of several concentric metallic rings and on-axis stop with external layer of transparent dielectric that integrates all elements. Investigations are carried out using the Finite-Difference Time-Domain method and the Transfer Matrix Method. The nanolenses are diffractive optical elements that concentrate radially polarized Laguerre-Gauss illumination as tightly as high-NA refractive optical systems.

plasmonic superlenses

metal-dielectric multilayers

plasmonics

Author

T. Stefaniuk

University of Warsaw

P. Wróbel

University of Warsaw

Tomasz Antosiewicz

Chalmers, Applied Physics, Condensed Matter Theory

T. Szoplik

University of Warsaw

International Conference on Transparent Optical Networks

21627339 (eISSN)


978-1-4673-2227-0 (ISBN)

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/ICTON.2012.6254434

ISBN

978-1-4673-2227-0

More information

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