Scalability of transport parameters with pore sizes in isodense disordered media
CNRS, Université of Bordeaux CRPP, UPR 8641 - F-33600 Pessac, France
Received: 30 June 2014
Accepted: 2 September 2014
We study light multiple scattering in complex disordered porous materials. High internal phase emulsion-based isodense polystyrene foams are designed. Two types of samples, exhibiting different pore size distributions, are investigated for different slab thicknesses varying from to . Optical measurements combining steady-state and time-resolved detection are used to characterize the photon transport parameters. Very interestingly, a clear scalability of the transport mean free path with the average size of the pores S is observed, featuring a constant velocity of the transport energy in these isodense structures. This study strongly motivates further investigations into the limits of validity of this scalability as the scattering strength of the system increases.
PACS: 42.25.Dd – Wave propagation in random media / 82.70.Kj – Emulsions and suspensions / 05.60.-k – Transport processes
© EPLA, 2014