Results 91 to 100 of about 1,750,058 (245)

All-optical phase conjugation using diffractive wavefront processing

Nature Communications
Optical phase conjugation (OPC) is a nonlinear technique used for counteracting wavefront distortions, with applications ranging from imaging to beam focusing.
Che-Yung Shen, Jingxi Li, Tianyi Gan, Yuhang Li, Mona Jarrahi, Aydogan Ozcan   +5 more
doaj   +1 more source

Noise-robust coherent diffractive imaging with a single diffraction pattern

Optics Express, 2012
The resolution of single-shot coherent diffractive imaging at X-ray free-electron laser facilities is limited by the low signal-to-noise level of diffraction data at high scattering angles. The iterative reconstruction methods, which phase a continuous diffraction pattern to produce an image, must be able to extract information from these weak signals ...
Martin A. V., Wang F., Loh N. D., Ekeberg T., Maia F. R. N. C., Hantke M., Van Der Schot G., Hampton C. Y., Sierra R. G., Aquila A., Bajt S., Barthelmess M., Bostedt C., Bozek J. D., Coppola N., Epp S. W., Erk B., Fleckenstein H., Foucar L., Frank M., Graafsma H., Gumprecht L., Hartmann A., Hartmann R., Hauser G., Hirsemann H., Holl P., Kassemeyer S., Kimmel N., Liang M., Lomb L., Marchesini S., Nass K., Pedersoli E., Reich C., Rolles D., Rudek B., Rudenko A., Schulz J., Shoeman R. L., Soltau H., Starodub D., Steinbrener J., Stellato F., Struder L., Ullrich J., Weidenspointner G., White T. A., Wunderer C. B., Barty A., Schlichting I., Bogan M. J., Chapman H. N.   +52 more
openaire   +9 more sources

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Optimizing structured surfaces for diffractive waveguides

Nature Communications
We introduce universal diffractive waveguide designs that can match the performance of conventional dielectric waveguides and achieve various functionalities.
Yuntian Wang, Yuhang Li, Tianyi Gan, Kun Liao, Mona Jarrahi, Aydogan Ozcan   +5 more
doaj   +1 more source

Quasi non-diffractive electron Bessel beams using direct phase masks with applications in electron microscopy

New Journal of Physics, 2019
Electron-beam shaping opens up novel imaging possibilities in electron microscopy (EM). The implementation of a phase or amplitude mask in the condenser lens system allows the generation of electron beams with various shapes. Non-diffractive Bessel beams
Simon Hettler, Lukas Grünewald, Marek Malac   +2 more
doaj   +1 more source

Semantic Modeling in Materials Science and Engineering With Platform MaterialDigital Core Ontology 3.0

Advanced Engineering Materials, EarlyView.
The community‐driven Platform MaterialDigital Core Ontology (PMDco) 3.0 is introduced as a Basic Formal Ontology‐aligned semantic backbone for the processing–structure–properties paradigm in Materials Science and Engineering. Modular engineering, automated releases, and validation workflows are highlighted and key semantic patterns for materials ...
Markus Schilling, Philipp von Hartrott, Jörg Waitelonis, Thomas Hanke, Henk Birkholz, Hossein Beygi Nasrabadi, Khashayar Razghandi, Kamilla Zaripova, Felix Thonagel, Fabian Neuhaus, Martin Glauer, Lars Vogt, Harald Sack, Lutz Mädler, Bernd Bayerlein, Chris Eberl   +15 more
wiley   +1 more source

Diffractive Hard Scattering

, 1999
Diffraction is an old subject which has received much interest in recent years due to the advent of diffractive hard scattering. We discuss some theoretical models and experimental results that have shown new striking effects, e.g.
Diffractive Hard Scattering, Gunnar Ingelman   +1 more
core  

Phase retrieval by coherent modulation imaging

Nature Communications, 2016
Robust coherent diffractive imaging generally requires many exposures that may damage samples. Here, the authors develop a single-shot X-ray imaging method applicable to general samples for materials and biological sciences, also enabling imaging of ...
Fucai Zhang, Bo Chen, Graeme R. Morrison, Joan Vila-Comamala, Manuel Guizar-Sicairos, Ian K. Robinson   +5 more
doaj   +1 more source

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source