During the last decades, a tremendous amount of experimental and theoretical work has been conducted, investigating the extraordinary structural and optical properties of metallic nanostructures. These properties are attributed to the excitation of surface plasmon-polaritons, making the materials exciting and promising for the use in opto-electronics and e.g. bio-sensing applications.

Here we will present our experimental results on the structural and optical properties of gold nanolines, which were produced by means of nanosphere lithography, providing a fast and simple method to reproducibly gain large and defect-free areas of the desired nanostructures.
The main focus of the investigations is on the structural characterization by means of atomic-force microscopy (AFM) and scanning-electron microscopy (SEM). They show that the width as well as periodicity of the lines depend on the production steps.

Furthermore we investigated the near- as well as far-field optical properties of the gold lines by means of scanning near-field optical microscopy and UV-vis spectroscopy (in the range between 0.5 and 6.2 eV) revealing a polarization dependent optical transmission, an evidence for SP generation. For these studies we used lines being 30nm thick, around 200nm broad and having a periodicity of 440nm.

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