Asymmetric parametric amplification in nonlinear left-handed transmission lines

摘要

We study parametric amplification in nonlinear left-handed transmissionlines, which serve as model systems for nonlinear negative index metamaterials.We experimentally demonstrate amplification of a weak pump signal in threeregimes: with the signal in the left-handed band, with the signal in the stopband, and with the signal at a defect frequency. In particular, we demonstratethe amplification of the incident wave by up to 15dB in the left-handed regime.