Study on polarization distribution characteristics of polarized light in scattering media

2019 ◽  
Author(s):  
Guang Han ◽  
Fang Liu ◽  
Ye Tian ◽  
Huiquan Wang ◽  
Jinhai Wang
Keyword(s):  
Polarized Light ◽  
Distribution Characteristics ◽  
Scattering Media ◽  
Polarization Distribution

scholarly journals Formation of half-period surface relief gratings in azobenzene containing polymer films

2020 ◽  
Vol 126 (9) ◽  
Author(s):  
Joachim Jelken ◽  
Carsten Henkel ◽  
Svetlana Santer
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Surface Relief ◽  
Incident Light ◽  
Glassy State ◽  
Polarized Light ◽  
Half Period ◽  
Polarization Distribution ◽  
Linearly Polarized ◽  
Set Up

Abstract We study the peculiar response of photo-sensitive polymer films irradiated with a certain type of interference pattern where one interfering beam is S-polarized, while the second one is P-polarized. The polymer film, although in a glassy state, deforms following the local polarization distribution of the incident light, and a surface relief grating (SRG) appears whose period is half the optical one. All other types of interference patterns result in the matching of both periods. The topographical response is triggered by the alignment of photo-responsive azobenzene containing polymer side chains orthogonal to the local electrical field, resulting in a bulk birefringence grating (BBG). We investigate the process of dual grating formation (SRG and BBG) in a polymer film utilizing a dedicated set-up that combines probe beam diffraction and atomic force microscopy (AFM) measurements, and permits acquiring in situ and in real-time information about changes in local topography and birefringence. We find that the SRG maxima appear at the positions of linearly polarized light (tilted by 45° relative to the grating vector), causing the formation of the half-period topography. This permits to inscribe symmetric and asymmetric topography gratings with sub-wavelength period, while changing only slightly the polarization of one of the interfering beams. We demonstrate an easy generation of sawtooth profiles (blazed gratings) with adjustable shape. With these results, we have taken a significant step in understanding the photo-induced deformation of azo-polymer films.

Polarized light imaging of object hidden in scattering media: model experiments

2001 ◽  
Author(s):  
Yurii P. Sinichkin ◽  
Dmitry A. Zimnyakov ◽  
Vadim V. Giterman
Keyword(s):  
Polarized Light ◽  
Scattering Media ◽  
Model Experiments ◽  
Polarized Light Imaging

Physically Realizable Space for the Purity-Depolarization Plane for Polarized Light Scattering Media

2017 ◽  
Vol 119 (3) ◽  
Author(s):  
Aziz Tariq ◽  
Pengcheng Li ◽  
Dongsheng Chen ◽  
Donghong Lv ◽  
Hui Ma
Keyword(s):  
Light Scattering ◽  
Polarized Light ◽  
Scattering Media

Study on Polarization Distribution of Polarization Encoder in Oblique Incidence

2011 ◽  
Vol 201-203 ◽  
pp. 1590-1595
Author(s):  
Mu Zhun Zhou ◽  
Yan Ru Chen ◽  
Qi Zhao ◽  
Yu Xin
Keyword(s):  
Theoretical Calculations ◽  
Incident Light ◽  
Polarization State ◽  
Polarized Light ◽  
Linbo3 Crystal ◽  
Polarization Distribution ◽  
Electro Optic ◽  
Measurement Results ◽  
Polarization Encoding ◽  
Elliptically Polarized

Principle of polarization encoding based on electro-optic effect of LiNbO3 crystal is analyzed, effact on polarization encoding optical field effects is studied when the incident light direction changes. Theoretical calculations show that, with the angle between the direction of incident laser beam and the main axis of LiNbO3 crystal increases, rotation angle of polarization ellipse remain unchanged,but ellipticity changes at any other position except in the center of the encoder,at the top and bottom of encoder,polarization state changes from circularly polarized to elliptically polarized,at other position of the encoder, polarization states are still elliptically polarized light but with different ellipticity angle. Experiment measurement results are in accord with ones of the calculation.

Cloud-based online application for imitation of polarized light propagation in turbid scattering media

2020 ◽  
Author(s):  
Alexander Doronin ◽  
Hee Ryung Lee ◽  
Igor Meglinski ◽  
Alexander Bykov ◽  
Tatiana Novikova
Keyword(s):  
Light Propagation ◽  
Polarized Light ◽  
Scattering Media ◽  
Online Application

Analysis of the spatial distribution of polarized light backscattered from layered scattering media

2002 ◽  
Vol 7 (3) ◽  
pp. 313 ◽  
Author(s):  
I. M. Stockford ◽  
S. P. Morgan ◽  
P. C. Y. Chang ◽  
J. G. Walker
Keyword(s):  
Spatial Distribution ◽  
Polarized Light ◽  
Scattering Media
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