Focusing through random media in space and time: a transmission matrix approach
Disordered Systems and Neural Networks
2016-11-26 v2 Mesoscale and Nanoscale Physics
Abstract
We exploit the evolution in time of the transmission matrix following pulse excitation of a random medium to focus radiation at a selected time delay t' and position r. The temporal profile of a focused microwave pulse is the same as the incident Gaussian pulse. The contrast in space at time t' of the focused wave is determined by the participation number of transmission eigenvalues M' and the size N' of the measured transmission matrix. The initial rise and subsequent decay in contrast observed reflects the distribution of decay rates of the quasi-normal modes within the sample.
Cite
@article{arxiv.1305.0940,
title = {Focusing through random media in space and time: a transmission matrix approach},
author = {Zhou Shi and Matthieu Davy and Jing Wang and Azriel Z. Genack},
journal= {arXiv preprint arXiv:1305.0940},
year = {2016}
}
Comments
4 pages, 3 figures