Analysis and calibration of linear birefringence orientation parameter derived from Mueller matrix for multi-layered tissues (Conference Presentation)

Author(s):  
Weipeng Li ◽  
Honghui He ◽  
Tao Sun ◽  
Hui Ma
Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 45 ◽  
Author(s):  
Arturo Mendoza-Galván ◽  
Tania Tejeda-Galán ◽  
Amos Domínguez-Gómez ◽  
Reina Mauricio-Sánchez ◽  
Kenneth Järrendahl ◽  
...  

Transparent films of cellulose nanocrystals (CNC) are prepared by dip-coating on glass substrates from aqueous suspensions of hydrolyzed filter paper. Dragging forces acting during films’ deposition promote a preferential alignment of the rod-shaped CNC. Films that are 2.8 and 6.0 µm in thickness show retardance effects, as evidenced by placing them between a linearly polarized light source and a linear polarizer sheet in the extinction configuration. Transmission Mueller matrix spectroscopic ellipsometry measurements at normal incidence as a function of sample rotation were used to characterize polarization properties. A differential decomposition of the Mueller matrix reveals linear birefringence as the unique polarization parameter. These results show a promising way for obtaining CNC birefringent films by a simple and controllable method.


2020 ◽  
Vol 53 (1) ◽  
pp. 51-57
Author(s):  
Melissa Tan ◽  
Alexander T. Martin ◽  
Alexander G. Shtukenberg ◽  
Bart Kahr

In anisotropic crystals, optical isotropic points are wavelengths where linear birefringence disappears because the refractive indices for both eigenmodes are accidentally equivalent. Here, the optical isotropic point of ethylenediammonium selenate (EDSe) is tuned by generating a solid-solution series of EDSe doped with sulfate. Mueller matrix polarimetry and single-crystal X-ray diffraction are used to correlate changes in linear birefringence with the crystal composition of EDS x Se1−x . A scheme for using mixed crystals with isotropic points as tunable birefringent optical bandpass filters is proposed and their performance is modeled.


The possibility that a physical system may possess simultaneously two independent linear birefringences is a consequence of the Jones calculus formulated in 1948. Before this only one linear birefringence was known. The new one is characterized by a pair of orthogonal fast and slow axes that bisect those of the traditional linear birefringence. Apparently over­looked since it was initially postulated, the Jones birefringence is the subject of the present investigation. Pictorial symmetry arguments and a Mueller matrix method are used to identify systems in which both linear birefringences may exist. They are found to occur naturally in certain magnetic and non-magnetic crystals, for which the relevant uniaxial classes are listed. In addition, it is shown that the Jones birefringence may be induced in a fluid by the application of uniform electric and magnetic fields E and B , parallel to each other and transverse to the light path, the dependence being linear in EB . A quantitative theory relates both birefringences to physical property tensors and confirms the symmetry predictions. From the theory an assessment is made of the magnitude of the effect in a crystal and a gas, and although very much smaller than known linear birefringences, it should be capable of measurement.


2021 ◽  
Vol 146 ◽  
pp. 106690
Author(s):  
Binguo Chen ◽  
Weipeng Li ◽  
Honghui He ◽  
Chao He ◽  
Jun Guo ◽  
...  

2017 ◽  
Vol 50 (4) ◽  
pp. 1117-1124 ◽  
Author(s):  
Alexander T. Martin ◽  
Shane M. Nichols ◽  
Sichao Li ◽  
Melissa Tan ◽  
Bart Kahr

Circular birefringence (CB) is generally responsible for only a small perturbation to the state of light polarization in crystals that also exhibit linear birefringence (LB). As such, the magnetoelectric tensor of gyration, which gives rise to CB and optical activity, is less well determined than the electric permittivity tensor in optical models of the Mueller matrix. To visualize the effect of the magnetoelectric tensor on polarimetric measurements, reported here are experimental mappings of the Mueller matrix and of the CB in a new chiral crystal with accidental null LB at an accessible optical frequency. Single crystals of ethylenediammonium selenate (EDSeO4) were synthesized and characterized by X-ray diffraction and Mueller matrix measurements in transmission and reflection. The crystals are isomorphous with the corresponding sulfate salt. They are tetragonal, space groupP41(3)212. The constitutive relations of EDSeO4were recovered using a partial wave summation of incoherent reflections. The extraordinary and ordinary refractive indices cross at 364 nm (3.41 eV), a scenario commonly called the `isotropic point' or `iso-index point'. At this wavelength, the magnetoelectric tensor fully describes the polarization transformation, giving rise to a double cone of eigendirections.


1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1441-C8-1442 ◽  
Author(s):  
J. Ferré ◽  
J. P. Jamet ◽  
C. P. Landee ◽  
K. A. Reza ◽  
J. P. Renard
Keyword(s):  

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-955-C8-956 ◽  
Author(s):  
N. P. Kolmakova ◽  
R. Z. Levitin ◽  
A. I. Popov ◽  
N. F. Vedernikov ◽  
A. K. Zvezdin ◽  
...  

1999 ◽  
Author(s):  
D. Look, Jr.
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document