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Holey random walks: Optics of heterogeneous turbid composites

  Articoli su Riviste JCR/ISI  (anno 2013)

Autori:  Svensson T., Vynck K., Grisi M., Savo R., Burresi M., Wiersma D

Affiliazione Autori:  European Laboratory for Non-Linear Spectroscopy, University of Florence, Via Nello Carrara 1, 50019 Sesto Fiorentino, Firenze, Italy; Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Largo Fermi 6, 50125 Firenze, Firenze, Italy

Riassunto:  We present a probabilistic theory of random walks in turbid media with nonscattering regions. It is shown that important characteristics such as diffusion constants, average step lengths, crossing statistics, and void spacings can be analytically predicted. The theory is validated using Monte Carlo simulations of light transport in heterogeneous systems in the form of random sphere packings and good agreement is found. The role of step correlations is discussed and differences between unbounded and bounded systems are investigated. Our results are relevant to the optics of heterogeneous systems in general and represent an important step forward in the understanding of media with strong (fractal) heterogeneity in particular. DOI: 10.1103/PhysRevE.87.022120

Rivista/Giornale:  PHYSICAL REVIEW E
Volume n.:  87 (2)      Pagine da: 022120  a: 022120
Ulteriori informazioni:  This work benefited from the European Network of Excellence for Nanophotonics for Energy Efficiency and the ERC grant Photbots. T.S. gratefully acknowledge funding from The Swedish Research Council (postdoctoral fellowship Grant No. 2010-887). Erik Alerstam, Raffaella Burioni, and Alessandro Vezzani are thanked for useful discussions.
DOI: 10.1103/PhysRevE.87.022120

*Impact Factor della Rivista: (2013) 2.326   *Citazioni: 21
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  12/05/2019

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