Results 61 to 70 of about 129 (117)

Inverse Design of Photonic Systems

Laser &Photonics Reviews, Volume 18, Issue 5, May 2024.
The article presents advancements in inverse design for photonic systems. While computational tools mature for the identification of optimal parameters, challenges remain in determining suitable system topologies, especially for complex photonic schemes.
Benjamin MacLellan, Piotr Roztocki, Julie Belleville, Luis Romero Cortés, Kaleb Ruscitti, Bennet Fischer, José Azaña, Roberto Morandotti   +7 more
wiley   +1 more source

Increased spatial coherence length from an asymmetric crystal reflection at grazing exit

Journal of Synchrotron Radiation, Volume 31, Issue 3, Page 508-516, May 2024.
A multiple crystal diffraction arrangement with a final asymmetric crystal diffracting at grazing exit was found to yield a 76% longer spatial coherence length compared with that for a beam directly exiting a double‐crystal monochromator.Coherent X‐ray imaging is an active field at synchrotron sources.
Albert Macrander, Xianbo Shi, Walan Grizzoli, Xianrong Huang, Nino Pereira, Michael Wojcik, Lahsen Assoufid   +6 more
wiley   +1 more source

“Seeing” Beneath the Clouds—Machine‐Learning‐Based Reconstruction of North African Dust Plumes

AGU Advances, Volume 5, Issue 1, February 2024.
Abstract Mineral dust is one of the most abundant atmospheric aerosol species and has various far‐reaching effects on the climate system and adverse impacts on air quality. Satellite observations can provide spatio‐temporal information on dust emission and transport pathways.
Franz Kanngießer, Stephanie Fiedler
wiley   +1 more source

Implementing dark-field contrast imaging in computer tomography with simple setup Talbot-Lau-Interferometer

e-Journal of Nondestructive Testing

Josephine Gutekunst, Rainer Fettig, Elias Hamann, Marcus Zuber, Joachim Schulz   +4 more
doaj   +1 more source

A study of optical vortices inside the Talbot interferometer

, 2015
The optical Talbot interferometer has been used to explore the topological charges of optical vortices. We recorded the self-imaging of a diffraction grating in the near-field regime with the optical vortex of several topological charges. Our twisted light was generated by a spatial light modulator (SLM).
Panthong, Pituk, Srisuphaphon, Sorakrai, Pattanaporkratana, Apichart, Chiangga, Surasak, Deachapunya, Sarayut   +4 more
openaire   +2 more sources

Feasibility of a gravity measurement on antimatter using a Talbot-Lau interferometer [PDF]

, 2018
The past two decades have witnessed an increasing focus on cold antimatter physics, with the development of the Antiproton Decelerator at CERN as a supply of low-energy antiprotons. Among the open questions concerning antimatter, the result of a gravity measurement on anti-atoms as a direct test of the weak equivalence principle has attracted the ...
openaire   +1 more source

Moiré artifact reduction in grating interferometry using multiple harmonics and total variation regularization

Scientific Reports
X-ray interferometry is an emerging imaging modality with a wide variety of potential clinical applications, including lung imaging. A grating interferometer uses a diffraction grating to produce a periodic interference pattern and measures how a patient
Hunter C. Meyer, Joyoni Dey, Conner B. Dooley, Murtuza S. Taqi, Varun R. Gala, Christopher D. Morrison, Victoria L. Fontenot, Kyungmin Ham, Leslie G. Butler, Alexandra Noël   +9 more
doaj   +1 more source

Flexible X-ray Talbot-Lau interferometer and its theory

Optics Express
X-ray Talbot-Lau interferometer, offering multi-contrast for the imaged objects, has shown powerful capacity in imaging biological soft tissues, low density materials, etc. However, the length of the system is constant, which limits its applications. Here, we establish a new X-ray Talbot-Lau interferometer theory to achieve a flexible phase contrast ...
Zhao Wu, Guibin Zan, Qisi Lin, Yong Guan, Lijiao Tian, Kun Gao, Zhili Wang, Peiping Zhu, Wenbing Yun, Gang Liu, Yalin Lu, Yangchao Tian   +11 more
openaire   +2 more sources

Signal enhancement in X-ray Talbot interferometry with a pair of concave and convex parabolic phase gratings

Applied Physics Express
X-ray Talbot and Talbot–Lau interferometers consisting of transmission gratings are widely used for X-ray phase imaging, which depicts soft materials.
Atsushi Momose, Pouria Zangi, Pascal Meyer, Martin Börner, Shinji Kobayashi, Yichen Fang, Ryosuke Ueda, Yoshichika Seki   +7 more
doaj   +1 more source

Study on Talbot Pattern for Grating Interferometer

Journal of Radiological Science and Technology, 2015
Youngju Kim, Ohsung Oh, Jongyul Kim, Seung Wook Lee   +3 more
openaire   +1 more source