Results 111 to 120 of about 1,097,686 (233)

The AOLI low-order non-linear curvature wavefront sensor: a method for high sensitivity wavefront reconstruction [PDF]

open access: green, 2012
Jonathan Crass   +15 more
openalex   +1 more source

Phase Smoothing for Mutual Coupling Mitigation in Multifunctional Metasurfaces Designed with Diffractive Neural Networks

open access: yesAdvanced Optical Materials, Volume 14, Issue 1, 9 January 2026.
A diffractive neural networkdesigned metasurface operating at 86 GHz generates multiple holographic patterns by controlling the phase of subwavelength unit cells. A phase‐smoothing regularization mitigates mutual coupling, enabling accurate multifunctional wavefront shaping.
Damián Rodríguez‐Trujillo   +5 more
wiley   +1 more source

Large-Dynamic-Range Ocular Aberration Measurement Based on Deep Learning with a Shack–Hartmann Wavefront Sensor

open access: yesSensors
The Shack–Hartmann wavefront sensor (SHWFS) is widely utilized for ocular aberration measurement. However, large ocular aberrations caused by individual differences can easily make the spot move out of the range of the corresponding sub-aperture in SHWFS,
Haobo Zhang   +5 more
doaj   +1 more source

Metalens Array for Complex‐Valued Optical Discrete Fourier Transform

open access: yesAdvanced Optical Materials, Volume 14, Issue 3, 19 January 2026.
A single‐layer metalens‐array device performs complex‐to‐complex discrete Fourier transforms (DFTs) optically with O(N) digital time complexity. Integrated interferometric phase retrieval and error mitigation scheme enables accurate, compact, and low‐power optical computing. The approach provides a versatile framework for implementing arbitrary complex‐
Randy Stefan Tanuwijaya   +6 more
wiley   +1 more source

Time‐Domain Near‐Field Scanning Microscopy of Terahertz Metasurfaces

open access: yesAdvanced Photonics Research, Volume 7, Issue 1, January 2026.
Time‐domain near‐field scanning terahertz microscopy provides direct access to subwavelength electromagnetic fields on metasurfaces. By combining controlled polarization excitation with nanoscale probing, this technique enables quantitative visualization of localized hotspots, surface‐wave propagation, and wavefront manipulation, offering a powerful ...
Ruxue Wei, Soren Petersen, Weili Zhang
wiley   +1 more source

Emerging Trends in Nanophotonic Systems for Sustainable and Resilient Societies

open access: yesAdvanced Sensor Research, Volume 5, Issue 1, January 2026.
Nanophotonics provides a versatile platform for addressing emerging safety challenges, enabling real–time sensing, secure authentication, and adaptive vision control. This review highlights recent advances in nanophotonic materials and structures that translate nanoscale light–matter interactions into safety–critical applications, paving the way for ...
Hyun Min Kim   +7 more
wiley   +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

Super Time‐Resolved Tomography

open access: yesAdvanced Science, Volume 13, Issue 3, 14 January 2026.
A super time‐resolved tomography (STRT) approach is presented to reconstruct 4D X‐ray movies with an order‐of‐magnitude improvement in temporal resolution without sacrificing spatial resolution. By leveraging a physics‐informed deep learning algorithm that shares spatiotemporal features, STRT achieves high‐fidelity 3D reconstructions from sparse‐view ...
Zhe Hu   +6 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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