Multiple scattering of polarized light in disordered media exhibiting short-range structural correlations

Abstract

International audienc

Light in correlated disordered media

“…which is the so-called "on-shell approximation". Second, we assume that the field is fully depolarized, which is a perfectly acceptable hypothesis after many scattering events (i.e., far from a coherent, polarized source) (Bicout and Brosseau, 1992;Gorodnichev et al, 2014;Vynck et al, 2016). This gives…”

“…Important efforts have been made in recent years to elucidate the role of structural correlations on the emergence of photonic gaps and on Anderson localization in two-dimensional (Conley et al, 2014;Florescu et al, 2009;Froufe-Pérez et al, 2016 and three-dimensional disordered systems (Aubry et al, 2020;Haberko et al, 2020;Klatt et al, 2019;Ricouvier et al, 2019). Near-field interaction and light polarization considerably complexify theoretical modelling (Escalante and Skipetrov, 2017;Vynck et al, 2016), explaining the widespread use of full-wave numerical methods to address this issue, alongside phenomenological models (Naraghi et al, 2015). The so-called hyperuniform disordered structures (Torquato and Stillinger, 2003) have received considerable attention in this context, leading to a wider exploration of their optical properties (Bigourdan et al, 2019;Leseur et al, 2016;Sheremet et al, 2020) and advances on top-down and bottom-up fabrication techniques (Maimouni et al, 2020;Muller et al, 2017;Ricouvier et al, 2017;Weijs et al, 2015).…”

Acousto-optic effect in random media

“…Second, effects due to polarization of the optical field have not been discussed. Recent progress on polarized radiative transport and diffusion may lead to new results in this direction [36,37]. Third, the detection thresholds we have obtained must be considered to be best-case estimates.…”

“…where L 2 W 0 , as defined in (37), is evaluated at = 0. The RTE may be derived by averaging (45) over the random field η.…”

Achieving strongly negative scattering asymmetry factor in random media composed of dual-dipolar particles

“…The first term in the right hand side (RHS) of Eq. ( 55) gives the incoherent intensity produced by the total intensity (specifically, the total field correlation E(r j )E * (r i ) , which can be understood as a generalization of intensity [20,76]), while the second term denotes the incoherent intensity generated only by incoherent intensity. Since the incoherent intensity, originated from random fluctuations of total intensity, is usually much smaller than total intensity [20,75], it is then possible for us to neglect this term in the RHS of Eq.…”