Results 81 to 90 of about 2,790,274 (339)

Grafted optical vortex with controllable orbital angular momentum distribution.

Optics Express, 2019
In an optical vortex (OV) field, the orbital angular momentum (OAM) distribution strongly depends on the intensity, which results in difficulty in OAM independent modulation.
Hao Zhang, Xinzhong Li, Haixiang Ma, M. Tang, Hehe Li, Jie Tang, Y. Cai   +6 more
semanticscholar   +1 more source

Diagnostic Utility of Testing for Novel Murine Autoantibodies for Sjögren's Disease in the Rheumatology Outpatient Setting

Arthritis Care &Research, Accepted Article.
Objective The goal was to assess the diagnostic performance of three novel autoantibodies (NA) for Sjögren's disease (SjD) by comparing NA prevalence in patients with SjD, other autoimmune rheumatic diseases (ARDs), nonspecific chronic sialadenitis (CS), and controls.
Chadwick R. Johr, Michael D. George, Vatinee Y. Bunya, Nora Sandorfi, Mina Massaro‐Giordano, Frederick B. Vivino   +5 more
wiley   +1 more source

Optical Vortex-Pumped KTiOAsO₄ Narrow-Linewidth Picosecond-Pulsed Parametric Oscillator

Applied Sciences
Herein, we present a picosecond-pulsed optical vortex parametric oscillator capable of generating high-power, narrow-linewidth near- and mid-infrared optical vortex outputs.
Xiazhuo Jiao, Jianqiang Ye, Mailikeguli Aihemaiti, Yuxia Zhou, Sujian Niu, Xining Yang   +5 more
doaj   +1 more source

Topological stability of optical vortices diffracted by a random phase screen [PDF]

Компьютерная оптика, 2019
Here, we theoretically demonstrate that if a Gaussian optical vortex is distorted by a random phase screen (diffuser) then the average intensity distribution in the focus of a spherical lens has a form of a ring with a nonzero value on the optical axis ...
Victor Kotlyar, Alexey Kovalev, Alexey Porfirev   +2 more
doaj   +1 more source

Caustics of Non-Paraxial Perfect Optical Vortices Generated by Toroidal Vortex Lenses

Photonics, 2021
In this paper, we consider the comparative formation of perfect optical vortices in the non-paraxial mode using various optical elements: non-paraxial and parabolic toroidal vortex lenses, as well as a vortex axicon in combination with a parabolic lens ...
Svetlana N. Khonina, Sergey I. Kharitonov, Sergey G. Volotovskiy, Viktor A. Soifer   +3 more
doaj   +1 more source

Optical vortices and vortex solitons [PDF]

, 2005
Optical vortices are phase singularities nested in electromagnetic waves that constitute a fascinating source of phenomena in the physics of light and display deep similarities to their close relatives, quantized vortices in superfluids and Bose-Einstein condensates.
Desyatnikov, Anton S, Torner, Lluis, Kivshar, Yuri   +2 more
openaire   +2 more sources

Recent Advancements in Bulk Processing of Rare‐Earth‐Free Hard Magnetic Materials and Related Multiscale Simulations

Advanced Engineering Materials, EarlyView.
This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley   +1 more source

Microstructural Evolution and Mechanical Performance of Plasma‐Assisted Hybrid Friction Stir Welded Dissimilar Aluminum–Copper Joints

Advanced Engineering Materials, EarlyView.
Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi, Pankaj Shrivastava, Ganesh Chouhan, Velaphi Msomi   +3 more
wiley   +1 more source

Polarization-Dependent Distortion of the Vortex Light Field Generated Using a Vortex Retarder

IEEE Photonics Journal
A vortex retarder (VR) is a widely-used optical component for converting Gaussian light beams into vortex beams, exhibiting unique advantages in a few broadband applications.
Jinyu Pan, Zhiyuan Huang, Tiandao Chen, Donghan Liu, Yue Yu, Xinshuo Chang, Meng Pang, Yuxin Leng   +7 more
doaj   +1 more source

Sub-Rayleigh optical vortex coronagraphy

Optics Express, 2012
We introduce a new optical vortex coronagraph (OVC) method to determine the angular distance between two sources when the separation is sub-Rayleigh. We have found a direct relationship between the position of the minima and the source angular separation. A priori knowledge about the location of the two sources is not required.
MARI, ELETTRA, TAMBURINI, FABRIZIO, G. A. Swartzlander J.r., BIANCHINI, ANTONIO, BARBIERI, CESARE, ROMANATO, FILIPPO, B. Thidé   +6 more
openaire   +2 more sources