Near-field interactions and non-universality in speckle patterns produced by a point source in a disordered medium
Optics
2015-05-19 v1
Abstract
A point source in a disordered scattering medium generates a speckle pattern with non-universal features, giving rise to the so-called C_0 correlation. We analyze theoretically the relationship between the C_0 correlation and the statistical fluctuations of the local density of states, based on simple arguments of energy conservation. This derivation leads to a clear physical interpretation of the C_0 correlation. Using exact numerical simulations, we show that C_0 is essentially a correlation resulting from near-field interactions. These interactions are responsible for the non-universality of C_0, that confers to this correlation a huge potential for sensing and imaging at the subwavelength scale in complex media.
Cite
@article{arxiv.1007.4099,
title = {Near-field interactions and non-universality in speckle patterns produced by a point source in a disordered medium},
author = {Alexandre Cazé and Romain Pierrat and Rémi Carminati},
journal= {arXiv preprint arXiv:1007.4099},
year = {2015}
}