Phase Conjugation and Negative Refraction Using Nonlinear Active Metamaterials

Abstract

We present experimental demonstration of phase conjugation using nonlinear metamaterial elements. Active split-ring resonators loaded with varactor diodes are demonstrated theoretically to act as phase-conjugating or time-reversing discrete elements when parametrically pumped and illuminated with appropriate frequencies. The metamaterial elements were fabricated and shown experimentally to produce a time reversed signal. Measurements confirm that a discrete array of phase-conjugating elements act as a negatively-refracting time reversal RF lens only 0.12$\lambda$ thick.

References in corpus (4)

• Tunable split-ring resonators for nonlinear negative-index metamaterials
• Self-consistent calculation of metamaterials with gain
• Nonlinear properties of split-ring resonators
• Second-Harmonic Generation and Spectrum Modulation by Active Nonlinear Metamaterial

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