Results 151 to 160 of about 4,173 (275)

Genetic algorithm for feedback-based wavefront shaping in optical imaging

open access: yes, 2019
Traditional optical devices rely on light propagation along a straight path. However, when the light propagates through a blurred medium, its direction get scattered by microscopic particles.
Upputuri, Paul Kumar   +5 more
core   +1 more source

Metasurface‐Based Polarization‐Controlled Generation of 128‐Dimensional Vector Vortex Combs

open access: yesLaser &Photonics Reviews, EarlyView.
The generation and continuous control of 128‐dimensional vector vortex combs using a single metasurface is reported. This work creates a class of structured light that uniquely integrates ultrahigh dimensionality with vector properties, and represents a crucial step toward on‐chip, reconfigurable generators for ultrahigh‐dimensional vector structured ...
Jiaqi Wang, Wenxi Wang, Wen Chen
wiley   +1 more source

Hydroxyl‐Terminated Polybutadiene‐Based Molding Powders as an Alternative Route for Manufacturing Pressed Polymer‐Bonded Explosives

open access: yesPropellants, Explosives, Pyrotechnics, EarlyView.
This study presents an alternative method to manufacture polymer‐bonded explosives by partially curing an HTPB‐based molding powder prior to compaction. The study shows that the length of partial cure time before compaction directly influenced the geometric fidelity, homogeneity, compressive strength, density, and internal microstructure.
Ismar L. Chew   +4 more
wiley   +1 more source

Insights From the Alphasat Aldo Paraboni Experiment at Tito Scalo and Spino d'Adda: Characterizing Scintillation and Rain Attenuation at Ka‐ and Q‐Band Frequencies

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner   +5 more
wiley   +1 more source

Cavity-driven arbitrary in-plane focusing of phonon polaritons in hBN with deep-subwavelength confinement

open access: yesCommunications Physics
Precise control of phonon-polaritons (PhPs) in planar media is a central challenge for advancing mid-infrared nanophotonics. Here, we demonstrate cavity-driven excitation and shaping of in-plane PhPs in hBN using subwavelength resonators lithographically
Bogdan Borodin   +4 more
doaj   +1 more source

Mitigating stimulated Brillouin scattering in multimode fibers with focused output via wavefront shaping. [PDF]

open access: yesNat Commun, 2023
Chen CW   +11 more
europepmc   +1 more source

Precise 3D Tracking of Highly Non‐Planar Eukaryotic Flagellar Beating Patterns Using Digital Holographic Microscopy

open access: yesSmall Methods, EarlyView.
The 3D beating dynamics of eukaryotic flagella drive motility, sensory functions, and resource acquisition, yet highly non‐planar beating patterns remain poorly characterized. Based on Digital Holographic Microscopy, holoV3C enables label‐free 3D reconstruction of such complex dynamics with 53 nm axial resolution, demonstrated on mouse sperm and ...
Patryk Nienaltowski   +7 more
wiley   +1 more source

Structural, Compositional, and Dielectric State Profiling in Label‐Free Single‐Cell Monitoring

open access: yesSmall Methods, EarlyView.
Label‐free single‐cell monitoring leverages distinct physical interactions to access structural, compositional, and dielectric states of cells, enabling non‐perturbative, repeatable, and information‐rich measurements across diverse biological contexts. This review organizes representative platforms by intrinsic state variables and connects measurement ...
Changi Baek   +6 more
wiley   +1 more source

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

open access: yesHigh Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang   +4 more
wiley   +1 more source

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