Results 101 to 110 of about 1,705,952 (334)

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

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

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

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

Natural shaping of the cylindrically polarized beams

, 2010
We have experimentally and theoretically shown that the circularly polarized beam bearing singly charged optical vortex propagating through a uniaxial crystal can be split after focusing into the radially and azimuthally polarized beams in vicinity of ...
Alexeyev, Constantine, Fadeyeva, Tatyana, Shostka, Nataliya, Shvedov, Vladlen, Volyar, Alexander   +4 more
core   +1 more source

Phase-engineered metalenses to generate converging and non-diffractive vortex beam carrying orbital angular momentum in microwave region.

Optics Express, 2018
In this paper, ultra-thin metalenses are proposed to generate converging and non-diffractive vortex beam carrying orbital angular momentum (OAM) in microwave region.
Kuang Zhang, Yueyi Yuan, Dawei Zhang, Xumin Ding, B. Ratni, S. Burokur, Manjun Lu, Kun Tang, Qun Wu   +8 more
semanticscholar   +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

The generation and verification of Bessel-Gaussian beam based on coherent beam combining

Results in Physics, 2020
We propose a method to generate Bessel-Gaussian (BG) beam by Gaussian beam array where beamlets are arranged along a circle. The phase difference between adjacent beamlets is a constant, and the total phase increment is equal to 2πl (l is integer). Based
Tao Yu, Hui Xia, Wenke Xie, Guangzong Xiao, Hongjian Li   +4 more
doaj   +1 more source

Single- and double-vortex vector solitons in self-focusing nonlinear media

, 2004
We study two-component spatial optical solitons carrying an angular momentum and propagating in a self-focusing saturable nonlinear medium. When one of the components is small, such vector solitons can be viewed as a self-trapped vortex beam that guides ...
Kivshar, Yuri S., Salgueiro, Jose R.
core   +1 more source

Focused vortex-beam generation using gap-surface plasmon metasurfaces

Nanophotonics, 2019
In spite of a wide range of applications ranging from particle trapping to optical communication, conventional methods to generate vortex beams suffer from bulky configurations and limited performance.
Fei Ding, Yiting Chen, S. Bozhevolnyi
semanticscholar   +1 more source