Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 9: Poster 1

HL 9.101: Poster

Monday, March 23, 2009, 14:30–17:00, P2

Transmission line circuit analysis of split-ring resonator metamaterials — •Liwei Fu, Heinz Schweizer, and Harald Giessen — 4th Physics Institute, University of Stuttgart, 70550 Stuttgart, Germany

Split-ring resonators (SRRs) are well studied due to their application potentials for superlenses, cloaking devices, perfect absorbers, and magnetic levitation. There are different interpretations about the dependence of their resonance frequency on structure parameters using LC circuit models. However, these models can not explain the blue-shift of the resonance frequency with the metal thickness [1]. In this report, we show that by distinguishing between series impedance and shunt admittance and by fitting the numerical results using transmission line circuit models [2,3], we can quantitatively derive the dependence of the circuit parameters on the SRR structure parameters. Novel thickness dependent interpretations will be given. Clear physical insight in SRR-based metamaterials is obtained.

[1] H. Guo, N. Liu, L. Fu, S. Kaiser, H. Schweizer, and H. Giessen, Phys. Stat. Sol. (b) 244, 1256 (2007).

[2] L. Fu, H. Schweizer, H. Guo, N. Liu, and H. Giessen, Phys. Rev. B, 78, 115110 (2008).

[3] L. Fu, H. Schweizer, H. Guo, N. Liu, and H. Giessen, Appl. Phys. B 86, 425 (2007)