Quantum computing and condensed matter physics with microwave photons

Focusing inside negative index materials

Jeffrey B. Brock, Andrew A. Houck, and Isaac L. Chuang

Two key theoretical predictions for flat negative index lenses are that thicker lenses should have both internal and external foci, and that these foci should move linearly with small deviations in frequency. Two-dimensional electric field profiles of microwave transmission through rectangular slabs of composite wire and split-ring resonator material are presented. By scanning inside and outside the material, both internal and external foci are revealed. The power concentration around the internal focus is shown to have a negative curvature, consistent with the theoretical predictions.