A new type of optical rotation (OR) detector based on the phase retardation of the first-order diffraction beam has been constructed. The proposed detector responded to only OR properties by eliminating the circular dichroism (CD) effect. Thus, it could measure the optical rotatory dispersion curves in the Cotton band. Although the optical system requires the incident beam in which the phase re...

We report on the first polarimetric plasmonic biosensor based on arrays of bowtie nanoantennas. Using the Finite Element Method (FEM) the phase retardation between the components of light polarized parallel and perpendicular to the axis of the nanoantennas is studied. After optimizing them for high volumetric sensitivity at a wavelength of 780 nm, sensitivities ~5 rad/RIU are obtained, correspo...

A novel heterodyne polarimeter is designed to measure the concentration of chiral media. Optical common-path for the interference of the TE and TM waves, after a polarizer, is set up in our system to reduce noises from the environment. A phase-variable waveplate is placed behind the sample to enhance the phase signal change of rotation of polarization introduced by the sample itself. This enhan...

In this paper we present a review of the existing data on interferential mirror birefringence. We also report new measurements of two sets of mirrors that confirm that mirror phase retardation per reflection decreases when mirror reflectivity increases. We finally developed a computational code to calculate the expected phase retardation per reflection as a function of the total number of layer...

A single metallic nanodisk is the simplest plasmonic nanostructure, but it robust enough to generate a Fano resonance in forward and backward scattering spectra by increment of height symmetric asymmetric dielectric environment. Thanks phase retardation effect, non-uniform distribution electric field along aluminum (Al) generates out-of-plane higher-order modes, which interfere with dipolar mod...

We investigated in laboratory column experiments, the aqueous-phase transport of four n-alcohols (n-hexanol-nnonanol), three chlorinated aromatic compounds (chlorobenzene, o-dichlorobenzene, and o-chlorophenol), and two alkylbenzenes (ethylbenzene and p-xylene) in a waterunsaturated porous medium (sand). The influence of gasphase partitioning and interfacial adsorption on solute retardation dur...

We demonstrate a novel technique for measuring ultralow linear birefringence of supermirrors (high-reflectivity dielectric mirror coatings). The polarimetric cavity ringdown technique is used in conjunction with the differential detection scheme with circular polarization to enhance the measurement sensitivity. The technique could, in principle, provide the convenience and reliability of linear...

this is a discriptive study with the main goal to identify personal, pregnancy and delivery characteristics of mothers given birth to mentally retarded child. this study has been conducted in the rehabilitation center in tehran in 1994. a total of 150 women took part in this research, and the tool of was a check list which was completed by researcher through interview. the findings were illustr...

materials and methods a number of 100 patients with imr, normal karyotypes and negative fragile-x and metabolic tests were screened for subtelomeric abnormalities using mlpa technique. results nine of 100 patients showed subtelomeric abnormalities with at least one of the two mlpa kits. deletion in a single region was found in 3 patients, and in two different subtelomeric regions in 1 patient. ...