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arXiv · 1203.6298

Theory of pump-probe experiments of metallic metamaterials coupled to the gain medium

Zhixiang Huang·Thomas Koschny·Costas M. Soukoulis
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Abstract

We establish a new approach for pump-probe simulations of metallic metamaterials coupled to the gain materials. It is of vital importance to understand the mechanism of the coupling of metamaterials with the gain medium. Using a four-level gain system, we have studied light amplification of arrays of metallic split-ring resonators (SRRs) with a gain layer underneath. We find that that the differential transmittance ΔT/T can be negative for SRRs on the top of the gain substrate, which is not expected, and ΔT/T is positive for the gain substrate alone. These simulations agree with pump-probe experiments and can help to design new experiments to compensate the losses of metamaterials.

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Zhixiang Huang, Thomas Koschny, Costas M. Soukoulis. 2012-03-28. Theory of pump-probe experiments of metallic metamaterials coupled to the gain medium. https://doi.org/10.1103/physrevlett.108.187402

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