Results 251 to 260 of about 538,294 (297)

Polarization out of the vortex

Nature Physics, 2021
The virtual photons that are exchanged when a free-electron vortex beam interacts with a nanoscopic target unlock an explicit connection between polarized optical spectroscopy and the inelastic scattering of scalar electron waves.
openaire   +1 more source

The structure of the polar vortex

Journal of Geophysical Research: Atmospheres, 1992
Reconstruction of the Airborne Antarctic Ozone Experiment and Airborne Arctic Stratosphere Expedition aircraft constituent observations, radiative heating rate computations, and trajectory calculations are used to generate comparative pictures of the 1987 southern hemisphere (SH) late winter and 1989 northern hemisphere (NH) mid‐winter, lower ...
Mark R. Schoeberl, Leslie R. Lait, Paul A. Newman, Joan E. Rosenfield   +3 more
openaire   +1 more source

Polarization holography for vortex retarders recording

Applied Optics, 2013
We present an original static recording method for vortex retarders (VRs) made from liquid crystal polymers (LCPs) using the superimposition of several polarized beams. VRs are birefringent plates characterized by a rotation of their fast axis about their center. The new method is based on polarization holography and photo-orientable LCP.
Piron, Pierre, Blain, Pascal, Mawet, Dimitri, Habraken, Serge   +3 more
openaire   +3 more sources

Polarization basis for vortex beams

Journal of the Optical Society of America A, 2001
Attention is called to a polarization basis formed by four Jones vectors that is reducible to two basic structures. In these states the field is linearly polarized at any point, but the polarization direction changes with the angular coordinate. Very simple equations hold for the field lines of these basis vectors.
openaire   +2 more sources

Ozone decrease outside Arctic polar vortex due to polar vortex processing in 1997

Journal of Geophysical Research: Atmospheres, 2006
We examine the effect of polar vortex processing on ozone concentrations outside the 1997 Arctic polar vortex. The Arctic vortex in this year was well isolated, cold, and circumpolar, and it broke up unusually late. However, time threshold diagnostics (TTD) analysis using a middle vortex boundary defined by the first derivative of the equivalent ...
H. Akiyoshi, S. Sugata, M. Yoshiki, T. Sugita   +3 more
openaire   +1 more source

On the origin of polar vortex air

Journal of Geophysical Research: Atmospheres, 2001
Forward and backward three‐dimensional stratospheric polar vortex trajectory computations between fall and spring for each of the years 1992–1993 through 1999–2000 in the Northern Hemisphere and the years 1992–1999 in the Southern Hemisphere have been carried out.
Joan E. Rosenfield, Mark R. Schoeberl
openaire   +1 more source

Inherent Spin–Polarization Coupling in a Magnetoelectric Vortex

Nano Letters, 2022
Solid-state materials are currently being explored as a platform for the manipulation of spins for spintronics and quantum information science. More broadly, a wide spectrum of ferroelectric materials, spanning from inorganic oxides to polymeric systems such as PVDF, present a different approach to explore quantum phenomena in which the spins are set ...
Sujit Das, Valentyn Laguta, Katherine Inzani, Weichuan Huang, Junjie Liu, Ruchira Chatterjee, Margaret R. McCarter, Sandhya Susarla, Arzhang Ardavan, Javier Junquera, Sinéad M. Griffin, Ramamoorthy Ramesh   +11 more
openaire   +2 more sources

Properties of circularly polarized vortex beams

Optics Letters, 2006
The properties of circularly polarized vortex beams in cylindrical polarization bases are studied. A circularly polarized vortex beam is decomposed into radial and azimuthal polarization. With the proper combination of vortex charge and the handedness of the circular polarization, a focal field with an extremely strong longitudinal component as well as
openaire   +2 more sources

Vortex Tangle Polarized by Rotation

Journal of Low Temperature Physics, 2004
Almost all studies of vortex states in superfluid 4He have been concerned with either ordered vortex arrays driven by rotation or disordered vortex tangles driven, for example, by thermal counterfiow. In this work we study numerically what happens to vortices in the presence of both effects.
Tsubota M, Barenghi CF, Araki T
openaire   +2 more sources

Dynamics of a polarized vortex ring

Journal of Fluid Mechanics, 1994
This paper builds on our claim that most vortical structures in transitional and turbulent flows are partially polarized. Polarization is inferred by the application of helical wave decomposition. We analyse initially polarized isolated viscous vortex rings through direct numerical simulation of the Navier-Stokes equations using divergence-free ...
D. Virk, M. V. Melander, F. Hussain
openaire   +1 more source