CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Plasmonic lenses with long focal lengths

T. Stefaniuk ; P. Wrobel ; Tomasz Antosiewicz (Institutionen för teknisk fysik, Kondenserade materiens teori) ; T. Szoplik
International Conference on Transparent Optical Networks (2162-7339). (2012)
[Konferensbidrag, refereegranskat]

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.

Nyckelord: metal-dielectric multilayers, plasmonic superlenses, plasmonics

Denna post skapades 2012-10-23. Senast ändrad 2016-04-04.
CPL Pubid: 165024


Läs direkt!

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)


Elektroteknik och elektronik

Chalmers infrastruktur