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

metal-dielectric multilayers

plasmonics

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