Time-Reversal Mirrors In Chaotic Cavities

HERNAN L. CALVO; HORACIO M. PASTAWSKI; RODOLFO A. JALABERT

Complex Phenomena in Nanoscale Systems

Springer Netherlands

Lugar: Heidelberg; Año: 2009; p. 37 - 49

We study time-reversal mirrors in chaotic cavities using a semiclassical approach. We present calculations of the reconstructed signal under various conditions. The refocused signal is shown to build up in the region of the source, by multiple interference, in the form of a reversed wave. We demonstrate that the optimal reconstruction is achieved at the refocusing time and at the point of the original emission. This refocused signal scales linearly with the recording interval and inversely with the area of the cavity. We stress the importance of the underlying dynamics, and its role in the signal reconstruction when the time-reversal mirror operates under an external perturbation.