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Optical polarization
About: Optical polarization is a research topic. Over the lifetime, 13992 publications have been published within this topic receiving 244284 citations.
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TL;DR: In this article, the authors introduce the concept of systematically designing polarization sequences by Hamiltonian engineering, resulting in polarization sequences that are robust and fast, and theoretically derive sequences and experimentally demonstrate that they are capable of efficient polarization transfer from optically polarized nitrogen-vacancy (NV) centers in diamond to the surrounding 13C nuclear spin bath even in the presence of control errors.
Abstract: Dynamic nuclear polarization (DNP) is an important technique that uses polarization transfer from electron to nuclear spins to achieve nuclear hyperpolarization. Combining efficient DNP with optically polarized nitrogen-vacancy (NV) centers offers promising opportunities for novel technological applications, including nanoscale nuclear magnetic resonance spectroscopy of liquids, hyperpolarized nanodiamonds as magnetic resonance imaging contrast agents, and the initialization of nuclear spin–based diamond quantum simulators. However, none of the current realizations of polarization transfer are simultaneously robust and sufficiently efficient, making the realization of the applications extremely challenging. We introduce the concept of systematically designing polarization sequences by Hamiltonian engineering, resulting in polarization sequences that are robust and fast. We theoretically derive sequences and experimentally demonstrate that they are capable of efficient polarization transfer from optically polarized NV centers in diamond to the surrounding 13C nuclear spin bath even in the presence of control errors, making the abovementioned novel applications possible.
83 citations
TL;DR: Here it is demonstrated how the transmission matrix of a disordered material can be used to simultaneously measure the spectral and polarimetric properties of an optical field.
Abstract: The field transmitted through disordered media is essentially a randomly sampled version of the incident field. Properties of the initial field can be recovered if this sampling function or transmission matrix is known. Here we demonstrate how the transmission matrix of a disordered material can be used to simultaneously measure the spectral and polarimetric properties of an optical field.
83 citations
TL;DR: An in-line polarization rotator has been built into a single-mode birefringent fiber that utilizes periodic twists of the fiber's principal axes, which were formed by rocking the preform as the fiber was drawn.
Abstract: An in-line polarization rotator has been built into a single-mode birefringent fiber. The rotator utilizes periodic twists of the fiber’s principal axes, which were formed by rocking the preform as the fiber was drawn. The polarization conversion between the principal axes is wavelength dependent, with a bandwidth inversely proportional to the number of twist periods. The bandwidth of the present rotator was 4.8 nm for 100% conversion in a fiber length of 170 cm.
83 citations
TL;DR: The determination of blood clotting time and haemolysis ratio showed that these polyurethane/liquid crystal composite membranes appear to be beneficial in improving the blood compatibility and reducing the thrombogenicity.
83 citations
TL;DR: The model can be used to calculate polarization and luminance of rough astronomical bodies and surfaces as a function of the viewing angle and measurements of polarized light from Mars, Mercury, and the moon, including the phenomenon of negative polarization at small phase angles.
Abstract: A calculation is made of the luminance and polarization of light due to single and double reflections from the faces of particles in a surface composed of random, irregular particles using equations of electromagnetic waves and materials with a complex index of refraction Some geometric properties of shadows are derived and used Good agreement is obtained between these results and measurements of polarized light from Mars, Mercury, and the moon, including the phenomenon of negative polarization at small phase angles Negative polarization is found to be caused by shade and shadows affecting the double-reflected rays Graphical results are provided for materials of varied real and complex indices of refraction The model can be used to calculate polarization and luminance of rough astronomical bodies and surfaces as a function of the viewing angle Calculated ratios of single-reflected, double-reflected, and randomly diffused light can be related to the surface structure and optical properties of the material
82 citations