Time Reversal of Electromagnetic Waves

G. Lerosey, J. de Rosny, A. Tourin, A. Derode, G. Montaldo, and M. Fink
Phys. Rev. Lett. 92, 193904 – Published 14 May 2004

Abstract

We report the first experimental demonstration of time-reversal focusing with electromagnetic waves. An antenna transmits a 1μs electromagnetic pulse at a central frequency of 2.45 GHz in a high-Q cavity. Another antenna records the strongly reverberated signal. The time-reversed wave is built and transmitted back by the same antenna acting now as a time-reversal mirror. The wave is found to converge to its initial source and is compressed in time. The quality of focusing is determined by the frequency bandwidth and the spectral correlations of the field within the cavity.

  • Figure
  • Figure
  • Figure
  • Received 9 December 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.193904

©2004 American Physical Society

Authors & Affiliations

G. Lerosey, J. de Rosny, A. Tourin, A. Derode, G. Montaldo, and M. Fink

  • Laboratoire Ondes et Acoustique, ESPCI, Université Paris VII, UMR 7587, 10 rue Vauquelin, 75005 Paris France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 92, Iss. 19 — 14 May 2004

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×