Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 38: Nano-optics of metallic and semiconducting nanostructures (experiments I)
O 38.5: Vortrag
Mittwoch, 25. März 2009, 16:00–16:15, SCH A216
Three-dimensional metal photonic nanostructures using direct laser writing and electrodeposition — •Justyna Kinga Gansel1, Michael Thiel1, Klaus Bade2, Volker Saile2, Georg von Freymann1, Stefan Linden1, and Martin Wegener1 — 1Institut für Nanotechnologie, Forschungszentrum Karlsruhe; DFG-Center for Functional Nanostructures (CFN) and Institut für Angewandte Physik, Universität Karlsruhe (TH) — 2Institut für Mikrostrukturtechnik, Forschungszentrum Karlsruhe
An interesting part of the field of photonic nanostructures are metamaterials. Particularly, three-dimensional (3D) structures like 3D negative index metamaterials [1] or optical cloaking devices [2] attract increasing attention. Yet, few techniques for the fabrication of true 3D metamaterials exist [3, 4]. Here we present a method for the fabrication of 3D metal nanostructures. A positive or negative photoresist layer can be structured by direct laser writing, facilitating a wide amount of structure designs. The template is backfilled with gold using electrodeposition, where an ITO-layer below the photoresist acts as a cathode. After removal of the resist, free-standing gold nanostructures emerge. A structure design that can be realized using this method are 3D gold spirals. Corresponding simulations have shown that these structures possess interesting chiral properties.
[1] J. Valentine et al., Nature 455, 376 (2008)
[2] J. B. Pendry et al., Science 312, 1780 (2006)
[3] M. S. Rill et al., Nature Mater. 7, 543 (2008)
[4] N. Liu et al., Nature Mater. 7, 31 (2008)