Results 91 to 100 of about 34,816 (291)

Necklace-ring vector solitons [PDF]

, 2015
We introduce novel classes of optical vector solitons that consist of incoherently coupled self-trapped “necklace” beams carrying zero, integer, and even fractional angular momentum.
Desyatnikov, Anton S, Kivshar, Yuri
core   +1 more source

Partially coherent fractional vortex beam

Optics Express, 2018
We introduce a new kind of partially coherent vortex (PCV) beam with fractional topological charge named partially coherent fractional vortex (PCFV) beam and derive the propagation formula for such beam passing through a stigmatic ABCD optical system with the help of the convolution method.
Jun Zeng, Xianlong Liu, Fei Wang, Chengliang Zhao, Yangjian Cai   +4 more
openaire   +2 more sources

Entangled vector vortex beams [PDF]

Physical Review A, 2016
Light beams having a vectorial field structure, or polarization, that varies over the transverse profile and a central optical singularity are called vector vortex (VV) beams and may exhibit specific properties such as focusing into "light needles" or rotation invariance.
D'Ambrosio, Vincenzo, Carvacho, Gonzalo, Graffitti, Francesco, Vitelli, Chiara, PICCIRILLO, BRUNO, MARRUCCI, LORENZO, Sciarrino, Fabio   +6 more
openaire   +3 more sources

Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr3 Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting

Advanced Functional Materials, EarlyView.
The combination of formamidinium thiocyanate and 1,3‐propane diammonium iodide for bulk and top‐surface passivation, and a ternary fullerene blend to improve energy band alignment, suppresses energy losses in wide‐bandgap FAPbBr3 perovskite solar cells.
Laura Bellini, Daniël Grosfeld, Bruno Branco, Guus J. W. Aalbers, Lana M. Kessels, Willemijn H. M. Remmerswaal, Nicolas Daub, Kunal Datta, Martijn M. Wienk, René A. J. Janssen   +9 more
wiley   +1 more source

Effect of atmospheric turbulence on propagation properties of optical vortices formed by using coherent laser beam arrays

, 2008
In this paper, we consider the effect of the atmospheric turbulence on the propagation of optical vertex formed from the radial coherent laser beam array, with the initially well-defined phase distribution.
Andrews L C, Desyatnikov A S, Li-Gang Wang, Nye J F, Soskin M S, Wei-Wei Zheng   +5 more
core   +1 more source

Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis

Advanced Functional Materials, EarlyView.
An all‐optical method is presented for quantifying the density of boron vacancy spin defects in hexagonal boron nitride (hBN). By correlating Raman and photoluminescence signals with irradiation fluence, defect‐induced Raman modes are identified and established an relationship linking optical signatures to absolute defect densities. This enables direct
Atanu Patra, Paul Konrad, Andreas Sperlich, Timur Biktagirov, Wolf Gero Schmidt, Lesley Spencer, Igor Aharonovich, Sven Höfling, Vladimir Dyakonov   +8 more
wiley   +1 more source

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

Advanced Functional Materials, EarlyView.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou, Matt P. Tudball, Yiming Guo, Bia Brandt, Adam Zucconi, Wenjia Du, Junfu Bu, Daniel H. C. Wan, Jianuo Chen, Emanuele Magliocca, Feng Ryan Wang, Alexander J.E. Rettie, Patrick S. Grant, Paul R. Shearing, Rhodri Jervis, Thomas S. Miller   +15 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

Rising complexity of the OAM beam structure as a way to a higher data capacity

Light: Science & Applications, 2022
Standard vortex beams carrying different OAM (optical angular momentum) modes can provide independent communication channels for information transmission.
Andrey Pryamikov
doaj   +1 more source

Electron vortices in crystals

, 2011
The propagation of electron beams carrying angular momentum in crystals is studied using a multislice approach for the model system Fe. It is found that the vortex beam is distorted strongly due to elastic scattering.
Löffler, Stefan, Schattschneider, Peter
core   +2 more sources