Results 51 to 60 of about 70,968 (286)

Correcting vortex splitting in higher order vortex beams

Optics Express, 2014
We demonstrate a general method for the first order compensation of singularity splitting in a vortex beam at a single plane. By superimposing multiple forked holograms on the SLM used to generate the vortex beam, we are able to compensate vortex splitting and generate beams with desired phase singularities of order ℓ = 0, 1, 2, and 3 in one plane.
Richard, Neo, Shiaw Juen, Tan, Xavier, Zambrana-Puyalto, Sergio, Leon-Saval, Joss, Bland-Hawthorn, Gabriel, Molina-Terriza   +5 more
openaire   +2 more sources

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Effects of misalignments in the optical vortex transformation performed by holograms with embedded phase singularity

, 2010
Spatial characteristics of diffracted beams produced by a "fork" hologram from an incident circular Laguerre-Gaussian beam whose axis differ from the hologram optical axis are studied theoretically.
A.Ya. Bekshaev, Allen, Anan'ev, Anzolin, Anzolin, Basistiy, Basistiy, Bazhenov, Bekshaev, Bekshaev, Bekshaev, Bekshaev, Bekshaev, Berry, Berry, Born, Dennis, Franke-Arnold, Gibson, He, Heckenberg, Jack, Janke, Karimi, Karimi, Kotlyar, Kotlyar, Leach, Liu, Mair, Mawet, Molina-Terriza, Moreno, Nieminen, Osorio, Padgett, Pas'ko, Prudnikov, Prudnikov, Rozas, S.V. Sviridova, Sacks, Simpson, Slussarenko, Soskin, Swartzlander, Swartzlander, Tamburini, Wang   +48 more
core   +1 more source

Stereographical visualization of a polarization state using weak measurements with an optical-vortex beam [PDF]

, 2014
We propose a stereographical-visualization scheme for a polarization state by two-dimensional imaging of a weak value with a single setup. The key idea is to employ Laguerre-Gaussian modes or an optical vortex beam for a probe state in weak measurement ...
1324, 1325, 1326, Kobayashi, Hirokazu, Nonaka, Koji, Shikano, Yutaka   +5 more
core   +2 more sources

Integrated Compact Optical Vortex Beam Emitters [PDF]

Science, 2012
A Twist of Light The angular momentum of photons can be used to encode and transmit information. Cai et al. (p. 363 ) developed a method for generating and emitting controllable orbital angular momentum states of light from a reconfigurable ...
Cai, Xinlun, Wang, Jianwei, Strain, Michael J., Johnson-Morris, Benjamin, Zhu, Jiangbo, Sorel, Marc, O'Brien, Jeremy L., Thompson, Mark G., Yu, Siyuan   +8 more
openaire   +4 more sources

Process‐Informed Analysis of As‐Built Metal Additive Surface Features

Advanced Engineering Materials, EarlyView.
This article introduces a novel method for feature‐based surface texture characterisation directly incorporating manufacturing variables into the feature extraction workflow. This marks a major step towards identifying process‐specific surface properties and their influence on part function and hence a holistic understanding of process–structure ...
Theresa Buchenau, Adam Thompson, Hauke Brüning, Marc Amkreutz, Bernd Mayer, Samanta Piano   +5 more
wiley   +1 more source

Slow polaritons with orbital angular momentum in atomic gases

, 2011
Polariton formalism is applied for studying the propagation of a probe field of light in a cloud of cold atoms influenced by two control laser beams of larger intensity.
A. Mekys, E. Arimondo, G. Juzeliūnas, J. Ruseckas, L. Allen, M. O. Scully   +5 more
core   +1 more source

Propagation Properties of an Off-Axis Hollow Gaussian-Schell Model Vortex Beam in Anisotropic Oceanic Turbulence

Journal of Marine Science and Engineering, 2021
Based on the extended Huygens–Fresnel principle and the power spectrum of anisotropic oceanic turbulence, the analytical expressions of the average intensity and coherence properties of an off-axis hollow Gaussian-Schell model (OAHGSM) vortex beam ...
Xinguang Wang, Le Wang, Shengmei Zhao
doaj   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

Extension of Friedel's law to Vortex Beam Diffraction

, 2016
Friedel's law states that the modulus of the Fourier transform of real functions is centrosymmetric, while the phase is antisymmetric. As a consequence of this, elastic scattering of plane wave photons or electrons within the first-order Born ...
Guzzinati, Giulio, Juchtmans, Roeland, Verbeeck, Jo   +2 more
core   +1 more source