University of Oulu

Lopushenko, I., Bykov, A., & Meglinski, I. (2023). Depolarization composition of backscattered circularly polarized light. Physical Review A, 108(4), L041502.

Depolarization composition of backscattered circularly polarized light

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Author: Lopushenko, Ivan1; Bykov, Alexander1; Meglinski, Igor2
Organizations: 1Opto-Electronics and Measurement Techniques, ITEE, University of Oulu, Oulu 90014, Finland
2College of Engineering and Physical Sciences, Aston University, Birmingham B4 7ET, United Kingdom
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
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Language: English
Published: American Physical Society, 2023
Publish Date: 2023-10-25


We consider the origin of unpolarized light resulting from the backscattering of circularly polarized light by a random turbid tissuelike disperse medium. We reveal the dynamics of the backscattered fraction of unpolarized light, disclosing its meticulous decomposition into two rigorously polarized components characterized by opposing helicities, with fully defined polarization states. Concurrently, their superposition, driven by multiple scattering within the medium, leads to the appearance of a fraction of linear polarization. We emphasize that the in-depth binding of circular polarization memory of light when the helicity flips occurs within the scattering medium, meaning the conservation of spin angular momentum. We anticipate that the results obtained hold significant implications for future studies, particularly in the field of tissue polarimetry and light vortices.

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Series: Physical review. A
ISSN: 2469-9926
ISSN-E: 2469-9934
ISSN-L: 2469-9926
Volume: 108
Issue: 4
Article number: L041502
DOI: 10.1103/PhysRevA.108.L041502
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: The authors acknowledge the support from ATTRACT II META-HiLight project funded by the European Union’s Horizon 2020 research and innovative programme under Grant Agreement No. 101004462, the Academy of Finland (Grant Project No. 325097), the Leverhulme Trust and The Royal Society (Ref. No. APX111232 APEX Awards 2021), and the Universities UK International (UUKi) and the DSTI – UK government Department for Science, Innovation and Technology (Light4Body grant project).
Academy of Finland Grant Number: 325097
Detailed Information: 325097 (Academy of Finland Funding decision)
Copyright information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.