Dynamic effect of phase conjugation on wave localization
Abstract
We investigate what would happen to the time dependence of a pulse reflected by a disordered single-mode waveguide, if it is closed at one end not by an ordinary mirror but by a phase-conjugating mirror. We find that the waveguide acts like a virtual cavity with resonance frequency equal to the working frequency omega_0 of the phase-conjugating mirror. The decay in time of the average power spectrum of the reflected pulse is delayed for frequencies near omega_0. In the presence of localization the resonance width is tau_s^{-1}exp(-L/l), with L the length of the waveguide, l the mean free path, and tau_s the scattering time. Inside this frequency range the decay of the average power spectrum is delayed up to times t simeq tau_s exp(L/l).
Cite
@article{arxiv.cond-mat/0110419,
title = {Dynamic effect of phase conjugation on wave localization},
author = {K. J. H. van Bemmel and M. Titov and C. W. J. Beenakker},
journal= {arXiv preprint arXiv:cond-mat/0110419},
year = {2007}
}
Comments
10 pages including 2 figures