Plasmonic lenses with long focal lengths
Paper i 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

plasmonics

metal-dielectric multilayers

Författare

T. Stefaniuk

Uniwersytet Warszawski

P. Wróbel

Uniwersytet Warszawski

Tomasz Antosiewicz

Chalmers, Teknisk fysik, Kondenserade materiens teori

T. Szoplik

Uniwersytet Warszawski

International Conference on Transparent Optical Networks

2162-7339 (eISSN)

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/ICTON.2012.6254434

ISBN

978-1-4673-2227-0