Results 171 to 180 of about 103,433 (302)

Portable Filter-Free Lens-Free Incoherent Digital Holography System

open access: yesPhotonics
A portable incoherent digital holography system without a polarization filter or a refractive lens was developed. Phase-shifted self-interference incoherent holograms of light diffracted from an object were generated without attenuation due to a ...
Tatsuki Tahara
doaj   +1 more source

Fresnel Magnetic Imaging of Ultrasmall Skyrmion Lattices

open access: yesAdvanced Science, Volume 13, Issue 4, 19 January 2026.
This study uncovers periodic contrast reversal in ultrasmall skyrmion lattice imaging through defocus‐modulated Fresnel magnetic microscopy, elucidating its origin in the sinusoidal contrast transfer function mechanism and providing fundamental insights into defocus‐mediated phase‐to‐intensity conversion processes in nanoscale magnetic imaging ...
Yongsen Zhang   +11 more
wiley   +1 more source

Phase retrieval of an electron vortex beam using diffraction holography [PDF]

open access: green, 2017
Federico Venturi   +8 more
openalex   +1 more source

Programmable Chiral Radiation via Spin‐Decoupled Metasurface with Integrated Compound Phases

open access: yesAdvanced Science, Volume 13, Issue 1, 5 January 2026.
A programmable spin‐decoupled metasurface integrating propagation and geometric phases enables high‐purity chiral radiation with reconfigurable emission direction. Spin‐selective radiators combined with a compound phase decoupling strategy suppress undesired components, while embedded PIN diodes allow real‐time directional control.
Lu Song   +8 more
wiley   +1 more source

Water‐Wave Pancharatnam‐Berry Phase Induced by 4D Spin‐Orbit State Evolution

open access: yesAdvanced Science, Volume 13, Issue 2, 9 January 2026.
The first observation of the Pancharatnam‐Berry (PB) phase in water waves is reported, revealing its extraordinary properties including unbounded phase values, spin‐momentum‐locked unidirectional channels, and a Poincaré hypersphere representation. These findings demonstrate the universality of the PB phase across different wave systems and in higher ...
Wanyue Xiao   +3 more
wiley   +1 more source

Cortical Microvascular Pulsatility in the Aging Mouse Brain and the Confounding Effects of Anesthesia

open access: yesAdvanced Science, Volume 13, Issue 4, 19 January 2026.
Multi‐modal optical imaging reveals microvascular pulsatility in the brain cortex of awake and anaesthetized mice. Awake hemodynamics in male mice are found to be remarkably stable until late life, with flow pulsatility being significantly higher than in females, despite similar average perfusion.
Mia Viuf Skøtt   +5 more
wiley   +1 more source

Orbital Angular Momentum Meta‐Holography with Full‐Polarization Control

open access: yesLaser &Photonics Reviews, Volume 20, Issue 1, 8 January 2026.
This work demonstrates full‐polarization‐controlled orbital angular momentum (OAM) holography using a single‐layer dielectric metasurface. By independently modulating the complex‐amplitude distributions of two circular polarizations, arbitrary spatially varying polarization is achieved while preserving OAM properties.
Yue Han   +6 more
wiley   +1 more source

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