Decomposition methods have been applied to in-plane Mueller matrix ellipsometric scattering data of the Spectralon reflectance standard. Data were measured at the wavelengths 532 nm and 1500 nm, using an achromatic optimal Mueller matrix scatterometer applying a photomultiplier tube and a high gain InGaAs detector for the two wavelengths. A parametric model with physical significance was deduced through analysis of the product decomposed matrices. It is found that when the data are analyzed as a function of the scattering angle, similar to particle scattering, the matrix elements are largely independent of incidence angle. To the first order, we propose that a Guassian lineshape is appropriate to describe the polarization index, while the decomposed diagonal elements of the retardance matrix have a form resembling Rayleigh single scattering. New models are proposed for the off diagonal elements of the measured Mueller matrix.
The nanoscale chiral arrangement in a bicomponent organic material system comprising donor and acceptor small molecules is shown to depend on the thickness of a film that is responsive to chiral light in an optoelectronic device. In this bulk heterojunction, a previously unreported chiral bis(diketopyrrolopyrrole) derivative was combined with an achiral non-fullerene acceptor. The optical activity of the chiral compound is dramatically different in the pure material and the composite, showing how the electron acceptor influences the donor's arrangement compared with the pure molecule.
The study focuses on using terahertz (THz) polarimetry imaging to enhance contrast between cancerous tissue and healthy tissue in human breast cancer specimens.
It utilizes multiple polarizations to capture how cancerous cells interact differently with THz electric fields compared to healthy cells, aiming for better image clarity.
Results show that cross-polarization signals are dependent on tissue orientation, revealing patterns that help differentiate between various tissue types, indicating THz polarimetry's potential for improved imaging in tumor analysis.
Achilles tendon injuries, as a widely existing disease, have attracted a lot of research interest. Mueller matrix polarimetry, as a novel label-free quantitative imaging method, has been widely used in various applications of lesion identification and pathological diagnosis. However, focusing on the recovery process of Achilles tendon injuries, current optical imaging methods have not yet achieved the label-free precise identification and quantitative evaluation.
- The study focuses on the development of high-quality nanoscale wideband polarizers using aluminum (Al) dimer nanostructures, which have shown superior performance compared to traditional wire-grid designs, especially in the near-infrared (NIR) and terahertz (THz) ranges.
- A novel nanoparticle polarizer design features semi-immersed Al nano-dimers on a calcium fluoride (CaF) substrate, achieving an impressive extinction ratio exceeding 55 dB across a 0.2 to 9 THz range, with peak values of 60 dB in the THz region.
- The research evaluates key performance parameters including insertion loss (about 1 dB) and overall
Recent advancements in nanotechnology have enabled the commercial availability of polarization image sensors, enhancing the retrieval of linear Stokes parameters in polarized light microscopy.
The proposed technique allows for real-time retrieval of the 3×3 Mueller matrix by encoding polarization states into the color channels and using a color polarization sensor in the microscope.
This study is the first to demonstrate snapshot retrieval of the Mueller matrix in polarized light microscopy, combining division of focal plane sensing and color encoding methods.
