Results 1 to 10 of about 762 (173)

Tuning Circular Dichroism and Circularly Polarised Luminescence in Single Crystals of a Perylene Diimide Macrocycle. [PDF]

Angew Chem Int Ed Engl
The circular dichroism (CD) and circularly polarised (CPL) of a bis‐perylene diimide macrocycle are measured in single crystals. These chiroptical properties are tuned by the macrocycle's π–π stacking interactions in the solid‐state. Abstract Chiral materials that manipulate circularly polarised light have burgeoning applications across optoelectronics,
Hartmann D, Penty SE, Krimovs A, Pal R, Gianga TM, Siligardi G, Barendt TA.   +6 more
europepmc   +3 more sources

Giant Polar Displacements via Strain Relaxation in Itinerant Ferromagnet SrRuO₃ Freestanding Films. [PDF]

Adv Sci (Weinh)
The discovery of substantial Ru off‐centre displacements exceeding 30 pm in SrRuO3 freestanding films is reported, achieved by properly controlling the strain relaxation process to engineer an expanded lattice. The work shows that tailored strain relaxation strategies can be used to design magnetic polar metals with desired electronic states in ...
Zhou X, Cui Z, Deng Q, Wang Y, Dong S, Wang Z, Lu Q, Wang J, Huang Q, Fu Z, Xiang B, Lu Q, Lu Y.   +12 more
europepmc   +2 more sources

Colossal Cryogenic Electro-Optic Response Through Metastability in Strained BaTiO₃ Thin Films. [PDF]

Adv Mater
Utilizing the thermodynamic theory of optical properties, a colossal cryogenic electro‐optic response in BaTiO3 thin films is designed and demonstrated by stabilizing a low symmetry metastable monoclinic phase via epitaxial strain tuning with an electro‐optic response reaching ≈2516 pm V−1 at 5 K. This approach represents a new paradigm for engineering
Suceava A, Hazra S, Ross A, Philippi IR, Sotir D, Brower B, Ding L, Zhu Y, Zhang Z, Sarkar H, Sarker S, Yang Y, Sarker S, Stoica VA, Schlom DG, Chen LQ, Gopalan V.   +16 more
europepmc   +2 more sources

Self-Assembly of Bent-Core Nematics in Nanopores. [PDF]

Small
Bent‐core nematic liquid crystals like CB7CB exhibit tunable molecular organization and optical responses when confined in cylindrical nanochannels of anodic aluminum oxide and silica. The study investigates how confinement–from weak to strong–modulates phase behavior, revealing heliconical structures, paranematic states, and birefringence patterns ...
Maksym AZ, Andrushchak AS, Shchur Y, Sahraoui B, Kula P, Lelonek M, Busch M, Huber P, Kityk AV.   +8 more
europepmc   +2 more sources

Arbitrary polarization control with a segmented APPLE-II undulator. [PDF]

J Synchrotron Radiat
A four‐segmented APPLE‐II undulator was constructed, and its operation has started at NanoTerasu BL13U. The performance of arbitrary polarization control using phase shifters is demonstrated.A newly developed four‐segmented APPLE‐II undulator enables arbitrary polarization control in the soft to tender X‐ray region.
Inaba K, Ohtsubo Y, Agui A, Kimura H, Sakuraba K, Horiba K, Kitamura M, Obara S, Nakatani T, Takeuchi T, Hosaka Y, Takahasi M.   +11 more
europepmc   +2 more sources

[HgX₂] Linear Group Enabled Ultraviolet Birefringent Crystal RbHg₅Br₁₁ with Strong Optical Anisotropy and Wide Bandgap. [PDF]

Adv Sci (Weinh)
Based on the “linear‐group” design strategy, a high performance ultraviolet birefringent material RbHg5Br11 with aligned linear [HgBr2] units, demonstrating a large birefringence (Δn ≈ 0.35@546 nm); a wide optical bandgap (≈3.73 eV); as well as a good crystal growth habit; is rationally designed; and fabricated by a simple solution method.
Du Y, Che W, Shi Y, Lu J, Zhou X, Liu T, Pan S, Li J.   +7 more
europepmc   +2 more sources

X-ray polarimetry and its application to strong-field quantum electrodynamics

High Power Laser Science and Engineering, 2023
Polarimetry is a highly sensitive method to quantify changes of the polarization state of light when passing through matter and is therefore widely applied in material science.
Qiqi Yu, Dirui Xu, Baifei Shen, Thomas E. Cowan, Hans-Peter Schlenvoigt   +4 more
doaj   +1 more source

ixpeobssim: A simulation and analysis framework for the imaging X-ray polarimetry explorer

SoftwareX, 2022
ixpeobssim is a simulation and analysis framework specifically developed for the Imaging X-ray Polarimetry Explorer (IXPE). Given a source model and the response functions of the telescopes, it is designed to produce realistic simulated observations, in ...
Luca Baldini, Niccolò Bucciantini, Niccolò Di Lalla, Steven Ehlert, Alberto Manfreda, Michela Negro, Nicola Omodei, Melissa Pesce-Rollins, Carmelo Sgrò, Stefano Silvestri   +9 more
doaj   +1 more source

Equalizing the Pixel Response of the Imaging Photoelectric Polarimeter Onboard the IXPE Mission

The Astronomical Journal, 2023
The Gas Pixel Detector is a gas detector, sensitive to the polarization of X-rays, currently flying onboard the Imaging X-ray Polarimetry Explorer (IXPE)—the first observatory dedicated to X-ray polarimetry.
John Rankin, Fabio Muleri, Alessandro Di Marco, Sergio Fabiani, Fabio La Monaca, Paolo Soffitta, Matteo Bachetti, Luca Baldini, Enrico Costa, Niccolò Di Lalla, Alberto Manfreda, Stephen L. O’Dell, Matteo Perri, Simonetta Puccetti, Brian D. Ramsey, Carmelo Sgrò, Allyn F. Tennant, Antonino Tobia, Alessio Trois, Martin C. Weisskopf, Fei Xie   +20 more
doaj   +1 more source

Ultra-high precision x-ray polarimetry with artificial diamond channel cuts at the beam divergence limit

Physical Review Research, 2020
We report on the use of synthetic single-crystal diamonds for high definition x-ray polarimetry. The diamonds are precision mounted to form artificial channel-cut crystals (ACCs). Each ACC supports four consecutive reflections with a scattering angle 2Θ_{
Hendrik Bernhardt, Annika T. Schmitt, Benjamin Grabiger, Berit Marx-Glowna, Robert Loetzsch, Hans-Christian Wille, Dimitrios Bessas, Aleksandr I. Chumakov, Rudolf Rüffer, Ralf Röhlsberger, Thomas Stöhlker, Ingo Uschmann, Gerhard G. Paulus, Kai S. Schulze   +13 more
doaj   +1 more source