Results 1 to 10 of about 3,158,309 (357)

Flexible Metamaterial Quarter-Wave Plate and Its Application in Blocking the Backward Reflection of Terahertz Waves

open access: yesNanomaterials, 2023
A terahertz flexible metamaterial quarter-wave plate (QWP) is designed and fabricated using polyimide as the substrate in this paper, with a 3 dB axial ratio bandwidth of 0.51 THz and high polarization conversion efficiency and transmittance.
Jinhai Sun   +6 more
doaj   +1 more source

An ultra-thin high-efficiency plasmonic metalens with symmetric split ring transmitarray metasurfaces

open access: yesResults in Physics, 2023
Metasurface lenses (or metalenses) have aroused great attentions and efforts in the community of metamaterials or metasurfaces due to its ultrathin device dimension and superior focusing performances. High-efficiency transmissive metalenses with an ultra-
Yong-Qiang Liu   +10 more
doaj   +1 more source

SpectralMAE: Spectral Masked Autoencoder for Hyperspectral Remote Sensing Image Reconstruction

open access: yesSensors, 2023
Accurate hyperspectral remote sensing information is essential for feature identification and detection. Nevertheless, the hyperspectral imaging mechanism poses challenges in balancing the trade-off between spatial and spectral resolution.
Lingxuan Zhu   +4 more
doaj   +1 more source

Structural properties in ruptured mitral chordae tendineae measured by synchrotron-based X-ray phase computed tomography

open access: yesJournal of Synchrotron Radiation, 2023
The link between the structural properties and the rupturing of chordae tendineae in the mitral valve complex is still unclear. Synchrotron-radiation-based X-ray phase computed tomography (SR-XPCT) imaging is an innovative way to quantitatively analyze ...
Yojiro Koda   +5 more
doaj   +1 more source

Slow dynamics of disordered zigzag chain molecules in layered LiVS2 under electron irradiation

open access: yesnpj Quantum Materials, 2021
Electronic instabilities in transition metal compounds often spontaneously form orbital molecules, which consist of orbital-coupled metal ions at low temperature.
Naoyuki Katayama   +10 more
doaj   +1 more source

Some features of a radio signal interaction with a turbulent atmosphere

open access: yesФизика волновых процессов и радиотехнические системы, 2022
On the basis of the solution of Maxwells equations system for electromagnetic radiation in a turbulent atmosphere the differential effective section of scattering of this radiation on turbulence is found.
Dmitriy S. Klyuev   +5 more
doaj   +1 more source

Monte Carlo simulation of coherent effects in multiple scattering [PDF]

open access: yes, 2005
Using a combination of the stochastic Monte Carlo technique and the iteration procedure of the solution to the Bethe-Salpeter equation, it has been shown that the simulation of the optical path of a photon packet undergoing an nth scattering event ...
Churmakov, D. Y.   +3 more
core   +1 more source

Exploring the underlying mechanism of acoustic radiation force on a sphere in a fluid-filled rigid tube

open access: yesAIP Advances, 2021
The propagation of sound waves in a fluid-filled rigid tube has potential application in acoustic particle-positioning, valuable reagent recovery, and noninvasive manipulation of targets.
Jingyao Shi   +3 more
doaj   +1 more source

Time-independent hybrid enrichment for finite element solution of transient conduction–radiation in diffusive grey media [PDF]

open access: yes, 2013
We investigate the effectiveness of the partition-of-unity finite element method for transient conduction–radiation problems in diffusive grey media. The governing equations consist of a semi-linear transient heat equation for the temperature ?eld and a ...
Mohamed, M.S.   +7 more
core   +1 more source

Gamma-ray Vortex Burst in Nonlinear Thomson Scattering with Refocusing Spiral Plasma Mirror

open access: yesUltrafast Science, 2023
The gamma-ray vortex burst in the nonlinear Thomson scattering when the laser wakefield accelerated electron bunch collides with an ultra-intense Laguerre–Gaussian laser that was reflected from the refocusing spiral plasma mirror.
Weijun Zhou   +3 more
doaj   +1 more source

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