Results 201 to 210 of about 16,732,055 (288)

Periodic radio and X-ray emission from an accreting white dwarf binary. [PDF]

Nat Astron
Rose K, Pritchard J, Murphy T, Driessen LN, Kaplan DL, Caleb M, Wang Z, Zic A, Andreoni I, Carney J, Barlow BN, Dobie D, Gu M, Heald G, Huber D, Lenc E, Leung JK, Lu W, Momose R, Pedersen MG, Qu Y, Rea N, de Ruiter I, Shaji K, Sivakoff GR, Thomson AJM, Wang YL, Yang GJ, Zahedy F.   +28 more
europepmc   +1 more source

Improved Post‐Processing Framework for Whole Slide Imaging and 3D Reconstruction

Microscopy Research and Technique, EarlyView.
Workflow for 3D reconstruction of marmoset whole‐slide histology. Individual tiles undergo vignette correction to address illumination artifacts before stitching into full‐section images. Sections are then reconstructed using the Possum framework, with a level‐set method incorporated at the nonlinear deformable stage to stabilize alignment and reduce ...
Emily L. De Leon Alvarado, Daryan Chitsaz, Ilana R. Leppert, Jennifer S. W. Campbell, Yangyingqi Zhou, G. Bruce Pike, Timothy E. Kennedy, Christine L. Tardif, Christopher D. Rowley   +8 more
wiley   +1 more source

Near‐Infrared Polarimetric Imaging With Nonlinear Flat‐Optics

Laser &Photonics Reviews, EarlyView.
ABSTRACT A compact and broadband polarimetric imaging platform is presented, based on second‐harmonic generation (SHG) in nonlinear flat‐optics. The system employs periodic all‐dielectric AlGaAs gratings to induce polarization‐dependent SH emission, enabling pixel by pixel direct retrieval of the full Stokes vector from an input intensity distribution ...
Evgenii Menshikov, Marco A. López Sánchez, Paolo Franceschini, Andrea Tognazzi, Domenico de Ceglia, Kristina Frizyuk, Costantino De Angelis   +6 more
wiley   +1 more source

A study of observational approaches for the time-domain astronomy

A study of observational approaches for the time-domain astronomy
「占星術」と呼ばれていた頃の天体観測は、「動く天体」(惑星)と「動かない天体」(恒星)の観測に大別された。占星術の主たる興味は不思議な動きを見せる惑星の動きであったが、恒星も興味の対象であった。星座としての恒星分布は惑星の位置を記録するための(固定された)基準として利用できたからである。恒星が運動していることに気づいたのは17世紀の天文学者E. ハレーである(固有運動の発見)。ハレーの頭上に輝いていた星々の中に、古代ギリシアのヒッパルコスが残した星表に記録された位置からずれているものがあることに気づいたのだ。一般に遠方に位置する天体は「止まっている」ように見えたり、その動きが無視できるほど小さく見える。例えば、上空で伸びていく飛行機雲より眼前のハエの方が「速く」見えたりする ...
openaire   +1 more source

Revealing the Resonant Physics of Open Photonic Time Crystals

Laser &Photonics Reviews, EarlyView.
ABSTRACT Photonic time crystals (PTCs) are media whose permittivity is modulated periodically in time, enabling momentum bandgaps and parametric amplification of light. Their realization at the nanoscale can revolutionize the study of light‐matter interactions.
Adrià Canós Valero, Sergei Gladyshev, David Globosits, Stefan Rotter, Egor A. Muljarov, Thomas Weiss   +5 more
wiley   +1 more source

Imaging of a van der Waals spin-orbit torque system using spin ensembles in hBN. [PDF]

Nat Commun
Zhang X, Zhou J, Hu C, Cai P, Deng K, Wang C, Agarwal N, Jin H, Al-Matouq FA, Xu S, Trivedi RS, Li S, Rathi S, Lu H, Jiang Z, Taufour V, Hovden R, Zhao L, Cheng R, Xu X, Santos EJG, Chu JH, Du CR, Wang H.   +23 more
europepmc   +1 more source

Epitaxial Integration of III–V Membrane Photodetectors With Lateral p–i–n Junctions on the Silicon‐On‐Insulator Waveguide Platform

Laser &Photonics Reviews, EarlyView.
Epitaxial growth forms III–V membranes directly atop the silicon waveguide layer on SOI, while in‐plane in situ doping defines lateral p–i–n InP/InGaAs junctions in a single growth step. The membrane photodetectors achieve 50 Gb/s NRZ‐OOK operation.
Zhao Yan, Yifu Chen, Martin Ebert, Ka Ming Wong, Wenjie Wang, Tim Grieb, Florian F. Krause, Andreas Rosenauer, Graham T. Reed, David J. Thomson, Qiang Li   +10 more
wiley   +1 more source

Intrinsically Design‐Rule‐Compliant Nanophotonic Inverse Design via Learned Generative Manifolds

Laser &Photonics Reviews, EarlyView.
A generative reparameterization framework for nanophotonic inverse design is introduced, restricting optimization to a learned manifold of design‐rule‐compliant geometries. Unlike conventional penalty‐based approaches, fabrication constraints are encoded intrinsically within the design representation.
Bahrem Serhat Danis, Demet Baldan Desdemir, Enes Akcakoca, Zeynep Ipek Yanmaz, Gulzade Polat, Ahmet Onur Dasdemir, Aytug Aydogan, Abdullah Magden, Emir Salih Magden   +8 more
wiley   +1 more source

Tunable Terahertz Generation in Dispersion‐Engineered ZnTe Waveguides

Laser &Photonics Reviews, EarlyView.
A dispersion‐engineered Zinc Telluride (ZnTe) slab waveguide platform enables tunable and efficient guided‐wave terahertz (THz) generation through modal phase matching. By tailoring the optical and THz modal dispersion, coherent THz emission is achieved across 0.1–3 THz.
Arun Jana, Cormac McDonnell, Mai Tal, Anastasiya Reveguk, Amit Kohn, Tal Ellenbogen   +5 more
wiley   +1 more source

Visible Octave Frequency Combs in Silicon Nitride Nanophotonic Waveguides Driven by Ti:Sapphire Lasers

Laser &Photonics Reviews, EarlyView.
Chip‐based frequency combs are usually pumped from telecom wavelengths, far from the visible. This work instead pumps close to the visible with a Ti:sapphire laser ‐ the source behind the original optical frequency combs and now becoming chip‐integrable‐ and lets silicon‐nitride waveguides convert it into efficient, octave‐spanning visible‐to‐infrared ...
Abdullah Alabbadi, Ewan Allan, Hanna Ostapenko, Pablo Castro‐Marín, Derryck T. Reid, Pascal Del'Haye   +5 more
wiley   +1 more source