2010/07/23 by A. Cazé, Alexandre Cazé, Romain Pierrat +1 · 1 citation
Engineering · Mathematics · Physics and Astronomy · #Condensed matter physics #Correlation #Geometry #Mathematics #Optics #Photonic Crystals and Applications #Physics #Point source #Random lasers and scattering media #Scattering #Speckle pattern #Statistical physics #Terahertz technology and applications #Universality (dynamical systems) #physics.optics
paper · pdf · doi:10.1103/physreva.82.043823
arxiv created 2010/07/23 · openalex publication_date 2010/10/15 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A point source in a disordered scattering medium generates a speckle pattern with nonuniversal features, giving rise to the so-called C0 correlation. We analyze theoretically the relationship between the C0 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 C0 correlation. Using exact numerical simulations, we show that C0 is essentially a correlation resulting from near-field interactions. These interactions are responsible for the nonuniversality of C0 that confers to this correlation a huge potential for sensing and imaging at the subwavelength scale in complex media.