Phase Conjugation and Negative Refraction Using Nonlinear Active Metamaterials

Details Phase Conjugation and Negative Refraction Using Nonlinear Active Metamaterials Phase Conjugation and Negative Refraction Using Nonlinear Active Metamaterials

2010-08-11

arxiv.org/abs/1008.1999v1

Phys. Rev. Lett. vol 105, p 123905 (2010)

Physics

Optics

Scientific paper

10.1103/PhysRevLett.105.123905

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.

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