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 Date: 2013-01-30 11:32:19Electromagnetism Materials science Optical materials Split-ring resonator Negative index metamaterials Metamaterial Backward wave oscillator Phase velocity Dispersion relation Physics Metamaterials Nanomaterials |
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PHYSICAL REVIEW B 86, Active negative-index metamaterial powered by an electron beam M. A. Shapiro,1 S. Trendafilov,2 Y. Urzhumov,3 A. Al`u,4 R. J. Temkin,1 and G. Shvets2,* 1