Publications [#283117] of Steven A. Cummer

Papers Published

1. Katko, AR; Gu, S; Barrett, JP; Popa, B-I; Shvets, G; Cummer, SA, Phase conjugation and negative refraction using nonlinear active metamaterials., Physical Review Letters, vol. 105 no. 12 (September, 2010), pp. 123905 [20867644], [doi]
   (last updated on 2023/06/01)

   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.