Regensburg 2007 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 22: Photonic crystals II

HL 22.7: Vortrag

Dienstag, 27. März 2007, 15:45–16:00, H13

Thickness dependence of the optical properties of split ring resonator metamaterials — •Hongcang Guo¹, Na Liu¹, Liwei Fu¹, Heinz Schweizer¹, Stefan Kaiser², and Harald Giessen¹ — ¹4th Physics Institute, University of Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany — ²1st Physics Institute, University of Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany

We study the thickness dependence of the resonant properties of split-ring-resonators (SRRs) in the optical regime using experiments and numerical simulations. It is shown that the so-called LC resonance frequency of an SRR increases with its thickness, rather than being constant as indicated by the inductor-capacitor (LC) circuit model. An equivalent cut-wire model based on plasmonic interpretation is applied to analyze the resonant behavior of SRRs, and good agreement between experiment and numerical simulation is obtained. It is proven that the plasmonic interpretation of metamaterials resonances is an appropriate model when studying SRR optical behavior.

[1]. C. Rockstuhl, F. Lederer, C. Etrich, T. Zentgraf, J. Kuhl, and H. Giessen, Optics Express 14, 8827 (2006). [2]. H. C. Guo, N. Liu, L. W. Fu, H. Schweizer, S. Kaiser, and H. Giessen, accepted in Phys. stat. sol. (b).