Papers by Keyword: Polarized Light

Abstract: We develop the method for determining the Mueller matrix elements using standard photometric ellipsometer. Small ellipsometer design changes give an opportunity to completely determine all elements of the Mueller matrix. It is shown how the values of Mueller matrix elements can be obtained from the measurements at different azimuthal positions of optical units.

Abstract: The polarization phenomenon occurs when the sunlight is scattered by atmospheric molecules. As a result, there is a polarization pattern in the sky. An amount of research shows that many nature insects can derive orientation information from this pattern, such as bees and ants. The fundamental polarization pattern in the sky is presented. The characters and the orientation mechanism of the nature insects are discussed. The basic principle of designing the polarization skylight navigation sensor is explained. The domestic and foreign relevant researches and application situation of this new navigation method are summarized in details. In the end, the characters of application fields and its application prospect are previewed.

Abstract: In the experiment of the polarization of light, circularly polarized light can’t be got though all instruments are carefully adjusted and the polarized light we get is generally regarded as elliptically polarized light. We analyzed the process and find the light we get isn’t circularly polarized light or elliptically polarized light as usually thought and deduced the light intensity distribution function and it can fit the experimental results with small errors.

Abstract: We have investigated the absorption spectra in ultra small diameter single walled boron nanotubes for parallel and perpendicular polarized light as well as unpolarized light. In this paper we have studied absorption spectra for armchair (3,3),zigzag (5,0) and chiral (4,2) boron nanotubes containing 12, 20 and 56 atoms respectively. It is observed that absorption is highest for armchair followed by zigzag and chiral nanotubes. It is also found that absorption is higher for (3,3) and (5,0) nanotubes for perpendicular polarized light as compared to parallel polarized light, whereas chiral nanotube shows higher and wide range of absorption for parallel polarized light instead of perpendicular polarized light. We have compared our results with SWCNT and SWBNNT of same chiral vectors.