We compare two different models of transport of light in a disordered system with a spherical Gaussian distribution of scatterers. A coupled dipole model, taking into account all interference effects, is compared to an incoherent model, using a random walk of particles. Besides the well-known coherent backscattering effect and a well pronounced forward lobe, the incoherent model reproduces extremely well all scattering features. In an experiment with cold atoms, we use the momentum recoil imparted on the center of mass of the sample as a partial probe of the light-scattering properties. We find that the force acting on the center of mass of the atoms is not well suited to exhibit the coherence effects in light propagation under multiple-scattering conditions.
Coherent and incoherent multiple scattering / J. Chabé, M. Rouabah, L. Bellando, T. Bienaimé, N. Piovella, R. Bachelard, R. Kaiser. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 89:4(2014 Apr 21).
|Titolo:||Coherent and incoherent multiple scattering|
|Parole Chiave:||atomic and molecular physics, and optics|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||21-apr-2014|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevA.89.043833|
|Appare nelle tipologie:||01 - Articolo su periodico|