Results 81 to 90 of about 3,652 (291)
Energy backflow in a focal spot of the cylindrical vector beam [PDF]
Компьютерная оптика, 2018 Using Richards-Wolf formulae it is shown that a tightly focused azimuthally-radially polarized m-th order laser beam with an arbitrary apodization function produces a reverse energy flow in the focal plane (m=2).
Sergey Stafeev +2 more
doaj +1 more source
Vortex and anti-vortex compositions of exact elegant Laguerre–Gaussian vector beams [PDF]
Applied Physics B, 2014 Reformulation of conventional beam definitions into their bidirectional versions and use of Hertz potentials make beam fields exact vector solutions to Maxwell's equations. This procedure is applied to higher-order elegant Laguerre-Gaussian beams of TM and TE polarization.
openaire +2 more sources
Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix
Advanced Materials, EarlyView.3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández +15 more
wiley +1 more source
Analysis of Hybrid Vector Beams Generated with a Detuned Q-Plate
Applied Sciences, 2020 We use a tunable commercial liquid-crystal device tuned to a quarter-wave retardance to study the generation and dynamics of different types of hybrid vector beams.
Julio César Quiceno-Moreno +4 more
doaj +1 more source
Generation of Coherent Extreme-Ultraviolet Vector-Vortex beams
, 2021 International audienceWe theoretically and experimentally introduce a novel structured EUV beam a vector-vortex which combines the helical phase and inhomogeneous polarization of vortex and vector beams.
Pandey, Alok Kumar +10 more
core
, 2023 Vortex beams that carry orbital angular moment (OAM) have recently attracted a great amount of research interest, and metasurfaces and planar microcavities have emerged as two prominent, but mostly separated, methods for Si chip-based vortex beam ...
Yan, Jize +5 more
core +1 more source
Advanced Materials, EarlyView.Inspired by Acorus calamus leaves, a heterogeneous eutectic skin integrates an aligned fibrous network within a hydrophobic eutectogel matrix. This hierarchical architecture triggers strain‐induced crystallization to achieve exceptional mechanical toughness and durable wet adhesion.
Jiayu Hou +16 more
wiley +1 more source
Tunable supercontinuum light vector vortex beam generator using a q-plate
, 2013 Spatially coherent multicolored optical vector vortex beams were created using a tunable liquid crystal q-plate and a supercontinuum light source. The feasibility of the q-plate as a tunable spectral filter (switch) was demonstrated, and the polarization
Sebastiao Pratavieira +22 more
core +1 more source
Designable van der Waals Crystal for Artificial Neuronal Cell Mimicking
Advanced Materials, EarlyView.Designable van der Waals crystal has been demonstrated for device‐scale neuronal cell mimicking. The structural similarity between ion‐channel in biological membranes and layered vdW lattices is realized with nano‐crystallization via Ar + H2S plasma sulfurization.
Jinhyoung Lee +23 more
wiley +1 more source
Probing the modal characteristics of novel beam shapes
, 2013 In this thesis, an investigation into the modal characteristics of novel beam shapes is presented. Sculpting the phase profile of a Gaussian beam can result in the generation of a beam with unique properties.
Mourka, Areti
core