Regensburg 2007 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 39: Nanostructures at Surfaces IV (Dots, Particles, Clusters, Arrays)

O 39.4: Vortrag

Mittwoch, 28. März 2007, 16:30–16:45, H36

Optical transmission through hexagonal sub-wavelength hole arrays in thin metal films — •Georgios Ctistis, Piotr Patoka, and Michael Giersig — Center of Advanced European Studies and Research (caesar), Ludwig-Erhard-Allee 2, 53175 Bonn, Germany

Nanostructured surfaces exhibit extraordinary optical properties as plasmon assisted transmission through sub-wavelength hole arrays. In this study we present near-field optical results of the light transmission through a nano-hole array in a metal film (gold and aluminium) produced by means of nanosphere lithography. The film thickness varied between 20 and 120 nm while the hole diameter and the inter-hole distance were kept constant at approx. 270 and 500 nm, respectively. Dependent on the thickness, a change in the transmission mechanism could be observed.