Results 71 to 80 of about 34,816 (291)
Deflective Vortex Beam Generation Based on Metasurfaces in the Terahertz Band
Leida xuebao, 2021 Terahertz vortex beams can be used to improve the communication capacity of radar communication systems and the resolution of imaging systems. This paper presents a deflective vortex beam generation method based on a reflective metasurface working in the
Hongyu SHI +6 more
doaj +1 more source
Electron vortex beams in a magnetic field: A new twist on Landau levels and Aharonov-Bohm states
, 2012 We examine the propagation of the recently-discovered electron vortex beams in a longitudinal magnetic field. We consider both the Aharonov-Bohm configuration with a single flux line and the Landau case of a uniform magnetic field.
A. Tonomura +6 more
core +3 more sources
Generation of multiterawatt vortex laser beams [PDF]
Applied Optics, 2014 13 pages, 7 ...
Ament, Craig +5 more
openaire +3 more sources
Defect Analysis of the β– to γ–Ga2O3 Phase Transition
Advanced Functional Materials, EarlyView.The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas +9 more
wiley +1 more source
The geometric phase and the geometrodynamics of relativistic electron vortex beams
, 2013 We have studied here the geometrodynamics of relativistic electron vortex beams from the perspective of the geometric phase associated with the scalar electron encircling the vortex line.
Bandyopadhyay, Pratul +2 more
core +1 more source
Clean‐Limit 2D Superconductivity in a Thick Exfoliated Kagome Film
Advanced Functional Materials, EarlyView.This study reports clean‐limit 2D superconductivity in a thick kagome system, analogous to the 3D case. It observes a drop in superfluid stiffness near the superconducting transition and a cusp‐like feature in the angular dependence of the upper critical field.
Fei Sun +3 more
wiley +1 more source
Photonics, 2023 Vortex beams carry orbital angular momentum (OAM), and their inherent infinite dimensional eigenstates can enhance the ability for optical communication and information processing in the classical and quantum fields.
Yanzhu Zhang +4 more
doaj +1 more source
Magnetic Effects in the Paraxial Regime of Elastic Electron Scattering
, 2016 Based on a recent claim [Phys. Rev. Lett. 116, 127203 (2016)] that electron vortex can be used to image magnetism at the nanoscale in elastic scattering experiments, using transmission electron microscopy, a comprehensive computational study is performed
Edström, Alexander +2 more
core +1 more source
Robust self-trapping of vortex beams in a saturable optical medium [PDF]
, 2016 We report the first observation of robust self-trapping of vortex beams propagating in a uniform condensed medium featuring local saturable self-focusing nonlinearity.
Boudebs, Georges +3 more
core +6 more sources
Optical vortex braiding with Bessel beams
Optics Letters, 2020 We propose the braiding of optical vortices in a laser beam with more than 2 π rotation by superposing Bessel modes with a plane wave. We experimentally demonstrate this by using a Bessel–Gaussian beam and a coaxial Gaussian, and we present measurements of three complete braids. The amount of braiding is fundamentally limited only
Andrew A. Voitiv +3 more
openaire +3 more sources