Results 71 to 80 of about 6,061,876 (188)

Near Resonant Raman Optical Activity Study of the Complex Cation Tris(ethylenediamine)cobalt(III) in Water: Experiment and DFT Calculation

Chirality, Volume 38, Issue 9, September 2026.
Corrected ROA spectrum of the ECD‐Raman (red curve) from the observed raw signal (black curve) reveals the intrinsic ROA signal of Δ‐[Co(en)3]3+, enabling an excellent theory‐experiment agreement. ABSTRACT Chiral metal complexes are important in catalysis and medicinal chemistry, where understanding their structural and optical properties is crucial ...
Maria Sara Raju, Nazanin Kordestani, Elen Duverger‐Nédellec, Yann Danten, Patrick Rosa, Elizabeth A. Hillard, Nicolas Daugey   +6 more
wiley   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, Volume 36, Issue 67, 20 August 2026.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

X-Ray Spectro-polarimetry with Photoelectric Polarimeters [PDF]

The Astrophysical Journal, 2017
Abstract We derive a generalization of forward fitting for X-ray spectroscopy to include linear polarization of X-ray sources, appropriate for the anticipated next generation of space-based photoelectric polarimeters. We show that the inclusion of polarization sensitivity requires joint fitting to three observed spectra, one for each of ...
openaire   +2 more sources

A Changing-Look AGN to Be Probed by X-ray Polarimetry [PDF]

Galaxies, 2018
Active galactic nuclei (AGN) produce the highest intrinsic luminosities in the Universe from within a compact region. The central engine is thought to be powered by accretion onto a supermassive black hole. A fraction of this huge release of energy influences the evolution of the host galaxy, and in particular, star formation.
Agís-González, Beatriz, Hutsemékers, Damien, Miniutti, Giovanni   +2 more
openaire   +3 more sources

High-Energy Polarization: Scientific Potential and Model Predictions

Galaxies, 2017
Understanding magnetic field strength and morphology is very important for studying astrophysical jets. Polarization signatures have been a standard way to probe the jet magnetic field.
Haocheng Zhang
doaj   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, Volume 347, Issue 7, August 2026.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source

Optical polarimetry studies of Seyfert galaxies [PDF]

, 1999
Optical imaging polarimetry has been performed on seven nearby Seyfert galaxies, three with face-on and four with edge-on host galaxies of various morphological classifications.
Felton, Michelle Ann
core  

Characterization of x-ray detectors in the MIT x-ray polarimetry beamline

X-Ray, Optical, and Infrared Detectors for Astronomy XI
The MIT X-ray Polarimetry Beamline is a facility that we developed for testing components for possible use in X-ray polarimetry. Over the past few years, we have demonstrated that the X-ray source can generate nearly 100% polarized X-rays at various energies from 183 eV (Boron K$α$) to 705 eV (Fe L$α$) using a laterally graded multilayer coated mirror (
Heine, Sarah N. T., Marshall, Herman L., Schneider, Benjamin, Lamar, Beverly, Kothnur, Nithya, Garner, Alan   +5 more
openaire   +2 more sources

Revealing the Hidden Stress Field and Its Thermal Input Dependence in Femtosecond Laser–Processed Silicon Photonic Chip Substrates via Weak Measurement

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
A novel noncontact method based on weak value amplification enables high‐sensitivity stress mapping of femtosecond laser processed silicon photonic chip substrates. It converts microscale stress into the birefringent phase via the photoelastic effect and reads it out with weak measurement, achieving a 0.37‐kPa detection limit.
Wanshou Sun, Baili Qiu, Jiaming Li, Haibing Xiao, Yafei Yu, Qingmao Zhang   +5 more
wiley   +1 more source

On the Making of IXPE

Galaxies
Drs. Weisskopf and Ramsey were the original Principal and Deputy Principal Investigators of the Imaging X-ray Polarimetry Explorer (IXPE). They outline the path to the development of IXPE and discuss the technical and programmatic history that led up to ...
Martin C. Weisskopf, Brian Ramsey
doaj   +1 more source