We report the direct observation of the development of long-range spatial intensity correlation and the growth of intensity fluctuations inside random media. We fabricated quasi-two-dimensional disordered photonic structures and probed light transport from a third dimension. Good agreement between experiment and theory is obtained. We were able to manipulate the long-range intensity correlation and intensity fluctuations inside the disordered waveguides by simply varying the waveguide geometry.
R. Sarma et al., "Probing Long-Range Intensity Correlations inside Disordered Photonic Nanostructures," Physical Review B - Condensed Matter and Materials Physics, vol. 90, no. 1, pp. 014203-1-014203-5, American Physical Society (APS), Jul 2014.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.90.014203
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