Connecting the microscopic depolarizing origin of samples with macroscopic measures of the Indices of Polarimetric Purity
Canabal-Carbia, Mónica (Universitat Autònoma de Barcelona. Departament de Física)
Estévez, Irene (Universitat Autònoma de Barcelona. Departament de Física)
Nabadda, Esther (Universidad Miguel Hernández de Elche. Instituto de Bioingeniería)
Garcia-Caurel, Enrique (Institut Polytechnique de Paris)
Gil Pérez, José Jorge (Universidad de Zaragoza. Departamento de Física Aplicada)
Ossikovski, Razvigor (Institut Polytechnique de Paris)
Márquez Ruiz, Andrés (Universitat d'Alacant. Departament de Física, Enginyeria de Sistemes i Teoria de la Senyal)
Moreno, Ignacio (Universidad Miguel Hernández de Elche. Instituto de Bioingeniería)
Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física)

Data:	2024
Resum:	In this work we show how a specific set of three depolarizing observables, the Indices of Polarimetric Purity (IPP), P1, P2 and P3, are ideal metrics to study the depolarization characteristic of media. We simulate different depolarizing scenarios, based on different depolarizing origins, and we study the corresponding IPP values. The simulations are based on the incoherent addition of multiple elemental polarizing elements, as ideal polarizers and/or retarders with different specific characteristics (orientation, retardance, transmittance, etc. ). Further depolarizing scenarios are also studied by including the effect of ideal depolarizers. We show for the first time how by analyzing depolarizing systems through IPP we unravel two different depolarizing origins: isotropic and anisotropic depolarization, with meaningful physical interpretation. The former, isotropic depolarization is related to pure scattering processes, and mainly connected with P3 observable. The later, anisotropic depolarization is originated by microscopic constituent elements showing polarimetric anisotropy (dichroic and/or birefringent elements with different characteristics) and anisotropic scattering produced by these elements, and mainly described by P1 and P2 observables. Both effects can be simultaneously observed in real samples and give us information of the processes that give rise to depolarization in light-matter interactions. The simulated results are experimentally validated by analyzing the depolarizing behavior, in terms of IPP, of diverse real samples with easy physical interpretation, and direct connection with simulations. The present study could be of interest in multiple scenarios, to further understand the depolarizing response of samples, and it can be of special interest for the study of biological tissues and pathologies, as they present important depolarizing behavior.
Ajuts:	Agencia Estatal de Investigación PID2021-126509OB-C21 Agencia Estatal de Investigación PDC2022-133332-C21 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00138 Agencia Estatal de Investigación PID2021-126509OB-C22 Agencia Estatal de Investigación PID2021-123124OB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/BP-00206
Nota:	Altres ajuts: acords transformatius de la UAB
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Biophotonics ; Depolarizers ; Indices of Polarimetric Purity ; Mueller matrices ; Polarization
Publicat a:	Optics and Lasers in Engineering, Vol. 172 (January 2024) , art. 107830, ISSN 0143-8166

DOI: 10.1016/j.optlaseng.2023.107830

11 p, 2.7 MB

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