Asymmetric parametric amplification in nonlinear left-handed transmission lines

TL;DR

This paper demonstrates experimental parametric amplification in nonlinear left-handed transmission lines across various regimes, achieving up to 15dB gain, advancing the understanding of nonlinear negative index metamaterials.

Contribution

It introduces experimental evidence of parametric amplification in nonlinear left-handed transmission lines, exploring multiple signal regimes and achieving significant gain.

Findings

Amplification of up to 15dB in the left-handed regime

Effective amplification in stop band and defect frequency regimes

Validation of nonlinear left-handed transmission lines as model systems

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.