Results 91 to 100 of about 65,338 (283)

Singularities in Computational Optics

Photonics
Phase singularities in optical fields are associated with a non-vanishing curl component of phase gradients. Huygen’s diverging spherical wavefronts that primary/secondary point sources emit, during propagation, a have zero curl component. Therefore, the propagation of waves that contain phase singularities exhibits new exciting features.
S. Deepa, Kedar Khare, Senthilkumaran Paramasivam   +2 more
openaire   +2 more sources

On some solitary wave solutions of the Estevez--Mansfield--Clarkson equation with conformable fractional derivatives in time

Open Physics
In this study, a generalization of the Estevez–Mansfield–Clarkson (EMC) equation that considers the presence of conformable time-fractional derivatives is investigated analytically.
Ahmed Nauman, Macías-Díaz Jorge E., Umer Shazia, Baber Muhammad Z., Jawaz Muhammad, Vargas-Rodríguez Héctor   +5 more
doaj   +1 more source

Numerical wave optics and the lensing of gravitational waves by globular clusters

, 2007
We consider the possible effects of gravitational lensing by globular clusters on gravitational waves from asymmetric neutron stars in our galaxy. In the lensing of gravitational waves, the long wavelength, compared with the usual case of optical lensing,
Bicknell, G. V., McClelland, David E., Moylan, Andrew J., Scott, Susan M., Searle, Antony C.   +4 more
core   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +1 more source

Synthesized Vortex Beams in the Turbulent Atmosphere

Frontiers in Physics, 2020
The results of our investigations on the control over the orbital angular momentum (OAM) of a laser beam synthesized through combination of wave fields of a fiber array are reviewed. Peculiarities of OAM formation in the case of control over the value of
Valerii P. Aksenov, Vadim V. Dudorov, Valeriy V. Kolosov, Valeriy V. Kolosov, Mikhail E. Levitsky   +4 more
doaj   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

Advanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida, Yanjie Wang, Thais A. Rodrigues, Paulo H. H. Nunes, Vagner R. de Mendonça, Paulo H. E. Falsetti, Leticia V. Savazi, Tao He, Alexandra V. Bardakova, Aida V. Rudakova, Jie Tian, Alexei V. Emeline, Osmando F. Lopes, Antonio Otavio T. Patrocínio, Jia Hong Pan, Caue Ribeiro, Detlef W. Bahnemann   +16 more
wiley   +1 more source

Dynamical characteristics and physical structure of cusp-like singular solitons in birefringent fibers

Results in Physics
In this paper, we explore optical nonlinear waves in a birefringent fiber by investigating the dynamics of a coupled nonlinear Schrödinger system with four-wave mixing factors.
A. Muniyappan, K. Manikandan, Aly R. Seadawy, E. Parasuraman   +3 more
doaj   +1 more source

Observation of Bulk Fermi Arc and Polarization Half Charge from Paired Exceptional Points

, 2017
The ideas of topology have found tremendous success in Hermitian physical systems, but even richer properties exist in the more general non-Hermitian framework.
Fu, Liang, Hsu, Chia Wei, Joannopoulos, John D., Nelson, Keith A., Peng, Chao, Soljacic, Marin, Yoon, Yoseob, Zhen, Bo, Zhou, Hengyun   +8 more
core   +1 more source

Enhancing CoFe Catalysts with V2CTX MXene‐Derived Materials for Anion Exchange Membrane Electrolyzers

Advanced Functional Materials, EarlyView.
MXene dervied CoFe composites show increased initial Oxygen Evolution Reaction (OER) activity compared to the pure CoFe and MXene in an Anion Exchange Membrane device. Vanadium vacancies in the MXene plays a role in increased OER activity and hinders Fe leaching in the AEM device over using the pure V2C MXene as a support material for the CoFe ...
Can Kaplan, Karuppasamy Dharmaraj, Thorsten Schultz, Leiqiang Qin, Ningjun Chen, Danielle A. Douglas‐Henry, Bastian Schmiedecke, Merve Buldu‐Akturk, Axel Zuber, Iris Dorbandt, Maximilian Reinhardt, Yael Rodriguez‐Ayllon, Yan Lu, Valeria Nicolosi, Norbert Koch, Johanna Rosen, Michelle P. Browne   +16 more
wiley   +1 more source

Paraxial light in a Cole-Cole nonlocal medium: integrable regimes and singularities

, 2005
Nonlocal nonlinear Schroedinger-type equation is derived as a model to describe paraxial light propagation in nonlinear media with different `degrees' of nonlocality.
Konopelchenko, Boris, Moro, Antonio
core   +2 more sources