Propagation and scattering of vector light beam in turbid scattering medium

Abstract

Due to its high sensitivity to subtle alterations in medium morphology the vector light beams have recently gained much attention in the area of photonics. This leads to development of a new non-invasive optical technique for tissue diagnostics. Conceptual design of the particular experimental systems requires careful selection of various technical parameters, including beam structure, polarization, coherence, wavelength of incident optical radiation, as well as an estimation of how the spatial and temporal structural alterations in biological tissues can be distinguished by variations of these parameters. Therefore, an accurate realistic description of vector light beams propagation within tissue-like media is required. To simulate and mimic the propagation of vector light beams within the turbid scattering media the stochastic Monte Carlo (MC) technique has been used. In current report we present the developed MC model and the results of simulation of different vector light beams propagation in turbid tissue-like scattering media. The developed MC model takes into account the coherent properties of light, the influence of reflection and refraction at the medium boundary, helicity flip of vortexes and their mutual interference. Finally, similar to the concept of higher order Poincaré sphere (HOPS), to link the spatial distribution of the intensity of the backscattered vector light beam and its state of polarization on the medium surface we introduced the color-coded HOPS.

OAM light propagation through tissue

“…In contrast, studies examining the effect of increasing beam order on beam penetration through biological tissue have shown that increasing order improves beam penetration. In recent years, the connection between attenuation and OAM has been investigated in the context of biology and medicine 7,8,13,[19][20][21] . Studies that have used numerical methods that model this problem have shown that increasing the topological charge does improve permeability and increases the contrast of the outgoing beam [22][23][24] .…”