Regensburg 2010 – scientific programme
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DS: Fachverband Dünne Schichten
DS 27: [O] Plasmonics and Nanooptics III (Joint Session DS/O/HL)
DS 27.10: Talk
Wednesday, March 24, 2010, 12:45–13:00, H32
Polarization-independent chiral split-ring resonator arrays with colossal optical activity — •Max Wunderlich, Sebastian Engelbrecht, Alexey Shuvaev, and Andrei Pimenov — Experimentelle Physik IV, Universität Würzburg
We have studied the optical activity of bi-layered split-ring resonator arrays. They form chiral quasi-molecules due to inductive coupling. We have examined these structures with the instruments of quasioptical terahertz-spectroscopy. Our investigation shows that such systems can produce a colossal optical activity of 600 degree per wavelength. This results might lead to negative refraction due to chirality. Furthermore we present a way to effectively suppress polarization-dependent behavior of split-ring resonator arrays by introducing Cn symmetries. Thus we have demonstrated a way to realize a ultra-thin orientation-independent polarization rotator.