Published in
American Institute of Physics, Applied Physics Letters, 8(94), p. 084105
DOI: 10.1063/1.3089842
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Asymmetric parametric amplification in nonlinear left-handed transmission lines
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Abstract
We study parametric amplification in nonlinear left-handed transmission lines, which serve as model systems for nonlinear negative index metamaterials. We experimentally demonstrate amplification of a weak pump signal in three regimes: with the signal in the left-handed band, with the signal in the stop band, and with the signal at a defect frequency. In particular, we demonstrate the amplification of the incident wave by up to 15dB in the left-handed regime.