Abstract
Two different transport regimes of light are observed in reflection from the same disordered photonic crystal. A model based on the scaling theory of localization explains the behavior of the path length-resolved reflection at two different probing wavelengths. Our results demonstrate the continuous renormalization of the photon diffusion coefficient measured in reflection from random media.
Highlights
The propagation of light in a disordered medium is often modeled as a random walk of photons [1, 2]
Systems comprised of compressed TiO2 powder [11], ground semiconductors [12], and planar photonic crystals [13] have all provided interesting and varied results. Many of these works derive their conclusions based on the scaling theory of localization [14] in which the optical diffusion coefficient is reduced as the size of the medium increases
We report the observation of two different transport regimes of reflected, multiply scattered light from the same disordered photonic crystal and describe the interaction with a model based on the scaling theory
Summary
The propagation of light in a disordered medium is often modeled as a random walk of photons [1, 2]. Many of these works derive their conclusions based on the scaling theory of localization [14] in which the optical diffusion coefficient is reduced as the size of the medium increases. We report the observation of two different transport regimes of reflected, multiply scattered light from the same disordered photonic crystal and describe the interaction with a model based on the scaling theory.
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