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SUMMARY:Polarization and spatial coherence of light in disordered media - 
 Kevin Vynck (CNRS (Centre national de la recherche scientifique))
DTSTART:20230324T143000Z
DTEND:20230324T150000Z
UID:TALK195808@talks.cam.ac.uk
DESCRIPTION:Light transport in disordered media is characterized by a mult
 iple scattering process\, which scrambles the direction\, phase and polari
 zation of the propagating waves. Since the polarization of an incident wav
 e is lost on average after a few scattering events\, it is expected that t
 he propagation of the average intensity in the diffusive limit corresponds
  to that of a scalar field. This progressive depolarization has been studi
 ed theoretically and experimentally for almost three decades\, yet recent 
 studies have shown that many aspects related to the vector nature of light
  in disordered media remain to be investigated.\nIn this talk\, I will pre
 sent a theoretical analysis based on multiple scattering theory of the pol
 arization and spatial coherence of light in disordered media. Analytical e
 xpressions for the diagonal and off-diagonal terms of the field correlatio
 n matrix are derived\, revealing in particular a strong anisotropy of spat
 ial coherence even at large distances from a polarized source [1]. We also
  show that short-range structural correlations\, described via the classic
 al scattering anisotropy parameter g\, affect the diffusion of polarized l
 ight in a highly nontrivial way [2].\n[1] K. Vynck\, R. Pierrat\, R. Carmi
 nati\, Phys. Rev. A 89\, 013842 (2014).[2] K. Vynck\, R. Pierrat\, R. Carm
 inati\, Phys. Rev. A 94\, 033851 (2016).\nCo-authors: Romain Pierrat and R
 &eacute\;mi Carminati
LOCATION:Seminar Room 1\, Newton Institute
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