Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.123905
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Funding
- DARPA [HR0011-05-C-0068]
- U.S. Air Force Office of Scientific Research (AFOSR) MURI [FA 9550-06-1-0279, FA 9550-08-1-0394]
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We present an 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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