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Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 2: Symposium Photonische Kristalle

HL 2.5: Vortrag

Montag, 8. März 2004, 12:15–12:45, H15

Metallic photonic crystals — •Harald Giessen1, Andre Christ2, Thomas Zentgraf2, Stefan Linden2, Kai Schubert2, Dietmar Nau1, Sergei Tikhodeev3, Nikolai Gippius3, and Jürgen Kuhl21Institute of Applied Physics, University of Bonn, Germany — 2Max-Planck-Institut für Festkörperforschung, Germany — 3General Physics Institute RAS, Moscow, Russia

We prepare two-dimensional gold nanodot arrays with a diameter of 100 nm and a thickness of 20 nm on a waveguide substrate. Upon light illumination, particle plasmons are formed inside the gold dots. These localized plasmons form an extended state via photonic interaction mediated by the waveguide underneath. The coupling leads to a strong and spectrally narrow reduction of the absorption within the plasmon spectrum [1]. We can measure the dispersion of these 2-dimensional metallic photonic crystals. Changing the structure to 1-dimensional gold nanowires allows even stronger coupling. Polaritons with a normal mode splitting of more than 250 meV are formed [2]. Furthermore, we demonstrate control of the dephasing times in the particle plasmons and quantum beats in the 20 fs range by varying the geometric arrangement [3]. A number of possible applications of these novel systems will be presented. This work was financially supported by DFG and BMBF.

[1] S. Linden et al., Phys. Rev. Lett. 86, 4688 (2001).
[2] A. Christ et al., Phys. Rev. Lett. 91, 183901 (2003).
[3] K. Schubert et al., phys. stat. sol. (c) 0, 1412 (2003).
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