Phase conjugation and negative refraction using nonlinear active metamaterials.
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 0.12λ thick.
Type
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https://hdl.handle.net/10161/4301Published Version (Please cite this version)
10.1103/PhysRevLett.105.123905Publication Info
Katko, Alexander R; Gu, Shi; Barrett, John P; Popa, Bogdan-Ioan; Shvets, Gennady;
& Cummer, Steven A (2010). Phase conjugation and negative refraction using nonlinear active metamaterials. Phys Rev Lett, 105(12). pp. 123905. 10.1103/PhysRevLett.105.123905. Retrieved from https://hdl.handle.net/10161/4301.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Steven A. Cummer
William H. Younger Distinguished Professor of Engineering
Dr. Steven Cummer received his Ph.D. in Electrical Engineering from Stanford University
in 1997 and prior to joining Duke University in 1999 he spent two years at NASA Goddard
Space Flight Center as an NRC postdoctoral research associate. Awards he has received
include a National Science Foundation CAREER award and a Presidential Early Career
Award for Scientists and Engineers (PECASE) in 2001. His current work is in a variety
of theoretical and experimental electromagnetic problems related to g

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