Abstract

We investigate metamaterials based on arrays of rolled-up gold/(In)GaAs microrolls. By finite-integration-technique simulations we show that these arrays interact resonantly with the magnetic component of an electromagnetic field and exhibit a negative effective permeability at terahertz frequencies. We find a strong dependence of the resonance frequency on small variations in the winding number $n$. We show that this dependence can be removed, if desired, by applying an additional slit into the metal layer of the tube.

©2011 Optical Society of America

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