Results 91 to 100 of about 302,870 (324)

Improved Models of Imaging of Skylight Polarization Through a Fisheye Lens

Sensors, 2019
Researchers have found that some animals can use the skylight polarization pattern for navigation. It is also expected to use the skylight polarization pattern for human navigating in the near future.
Shaobo Sun, Jun Gao, Daqian Wang, Tian Yang, Xin Wang   +4 more
doaj   +1 more source

Probing vacuum birefringence by phase-contrast Fourier imaging under fields of high-intensity lasers

, 2011
In vacuum high-intensity lasers can cause photon-photon interaction via the process of virtual vacuum polarization which may be measured by the phase velocity shift of photons across intense fields.
A. Piazza Di, A. Yariv, A.E. Siegman, A.N. Luiten, B. King, B. Marx, B. Tollis De, B. Tollis De, C. Amsler, D. Habs, E. Zavattini, G.M. Shore, G.V. Dunne, J. Schwinger, J.M. Maldacena, J.W. Goodman, K. Homma, N.B. Narozhny, N.B. Narozhnyi, N.B. Norozhny, O. Aharony, R. Karplus, R. Schützhold, T. Heinzl, T. Tajima, V. Weisskopf, V.I. Ritus, V.N. Baier, W. Dittrich, W. Heisenberg   +29 more
core   +1 more source

Submillimeter Polarimetry with PolKa, a reflection-type modulator for the APEX telescope [PDF]

, 2014
Imaging polarimetry is an important tool for the study of cosmic magnetic fields. In our Galaxy, polarization levels of a few up to $\sim$10\% are measured in the submillimeter dust emission from molecular clouds and in the synchrotron emission from ...
Güsten, Rolf, Hezareh, Talayeh, Kovacs, Attila, Kreysa, Ernst, Menten, Karl M., Schuller, Frederic, Siringo, Giorgio, Weiss, Axel, Wiesemeyer, Helmut   +8 more
core   +2 more sources

Differential polarization imaging. I. Theory

Biophysical Journal, 1987
A theory of differential polarization imaging is derived using Mueller calculus. It is shown that, for any arbitrary object, 16 images (in general different) can be obtained by combining different incident polarizations of light and measuring the specific polarization components transmitted or scattered by the object.
Kim, M., Keller, D., Bustamante, C.
openaire   +2 more sources

Computational polarization imaging from a single speckle image [PDF]

Optics Letters, 2012
We experimentally demonstrate that imaging of the degree of polarization (DOP) can be achieved from a single intensity image acquired under coherent illumination. This computational technique is based on the analysis of the speckle characteristics in a statistically homogeneous neighborhood of the pixel.
Fade, Julien, Roche, Muriel, Alouini, Mehdi   +2 more
openaire   +3 more sources

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

Advanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund, Arthur Schulz, Peter Lunkenheimer, Maryana Kraft, Thomas Bergler, Harald Oberhofer, Dirk Volkmer   +6 more
wiley   +1 more source

Electric Field Imaging Using Polarized Neutrons

Physical Review Letters, 2020
We experimentally demonstrate that electrically neutral particles, neutrons, can be used to directly visualize the electrostatic field inside a target volume that can be isolated or occupied. Electric-field images were obtained using a polychromatic, spin-polarized neutron beam with a sensitive polarimetry scheme.
Yuan-Yu Jau, Daniel S. Hussey, Thomas R. Gentile, Wangchun Chen   +3 more
openaire   +4 more sources

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Astronomical Polarimetry with the RIT Polarization Imaging Camera

, 2018
In the last decade, imaging polarimeters based on micropolarizer arrays have been developed for use in terrestrial remote sensing and metrology applications.
Brock, Neal, Ninkov, Zoran, Vorobiev, Dmitry   +2 more
core   +1 more source