Abstract
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 thick.
- Received 28 April 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.123905
© 2010 The American Physical Society
Synopsis
Proactive metamaterials
Published 17 September 2010
Structurally engineered electromagnetic materials have now been made from active elements, expanding the range of possible optical effects in such so-called “metamaterials.”
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