Results 121 to 130 of about 22,120 (193)
A Fourier collocation time domain method for numerically solving Maxwell's equations [PDF]
A new method for solving Maxwell's equations in the time domain for arbitrary values of permittivity, conductivity, and permeability is presented. Spatial derivatives are found by a Fourier transform method and time integration is performed using a ...
Shebalin, John V.
core +1 more source
Dynamic Plasmonic Metasurface Regulated by Drude‐Like Active Spacers
Advanced Photonics Research, Volume 7, Issue 5, May 2026.Optical properties of mirror‐coupled plasmonic metasurface are dynamically modulated by controlling intrinsic properties and geometric parameters of Drude‐like active spacers made of transparent conducting oxides and phase‐change materials. The resonance property of a hybrid plasmonic metasurface can be actively regulated by manipulating the ...
Alemayehu Nana Koya +2 more
wiley +1 more source
Advanced Science, Volume 13, Issue 25, 4 May 2026.A large‐aperture, high focusing efficiency and polarization‐independent THz single‐layer achromatic metalens is reported via discrete multi‐wavelength achromatic design and global optimization algorithm. The fabricated metalens exhibits a largest diameter of 2.21 cm, excellent achromatic performance, extremely high average focusing efficiency (> 46 ...
Xiaoqiang Jiang +7 more
wiley +1 more source
Metalens‐Enabled Twisted Chromatic Dispersion
Advanced Physics Research, Volume 5, Issue 5, May 2026.We successfully demonstrate visible broadband twisted dispersion metalenses. As a proof of concept, we realized two distinct devices: the conical helical and the spring‐like dispersion‐controlled metalenses. These results rigorously validate the universality of our approach in customizing arbitrary continuous 3D dispersion trajectories, thereby ...
Shiyu Zheng +3 more
wiley +1 more source
Clinical Applications of Electrical Conductivity Imaging Using MRI
Journal of Magnetic Resonance Imaging, Volume 63, Issue 5, Page 1224-1245, May 2026.ABSTRACT Magnetic resonance imaging (MRI) has emerged as a noninvasive technique for probing the electrical properties of biological tissues: electrical conductivity and relative permittivity. This review focuses on the electrical conductivity and provides a comprehensive overview of applications across both low‐ and high‐frequency regimes.
Stefano Mandija +14 more
wiley +1 more source
Autoformer‐Driven Convolutional Perfectly Matched Layer for 2D HIE‐FDTD Method
IET Microwaves, Antennas & PropagationAn innovative deep‐learning driven convolutional perfectly matched layer (CPML) integrated into the hybrid implicit‐explicit finite‐difference time‐domain (HIE‐FDTD) method is proposed to improve the efficiency of open‐region electromagnetic simulations.
Yexin Li +4 more
doaj +1 more source
Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 3008-3020, May 2026.ABSTRACT Purpose To develop a double‐tuned calf coil with excellent 1H and 31P performance to study muscle physiology by interleaved 1H/31P MRS and parallel imaging at 7 T. Methods The coil combines three 1H transceive dipoles, six 1H receive‐only loops and three 31P transceive loops, arranged in a nested, half‐cylindrical layout.
Veronika Cap +8 more
wiley +1 more source
Modular Fabrication of Quantum‐Dot–Plasmonic Metasurfaces for Tailored Optical Modes
Small Structures, Volume 7, Issue 5, May 2026.Our modular photonic architecture is illustrated using color‐coded building blocks representing colloidal quantum dots, gold nanoparticles, and thin films. This visual metaphor highlights our bottom‐up and top‐down fabrication approach, enabling the creation of tailored optical modes for optoelectronic applications.
Sezer Seçkin +6 more
wiley +1 more source
Solar RRL, Volume 10, Issue 7, 15 April 2026.Perovskite solar cells have reached high power‐conversion efficiencies, yet further gains require improved optical design, particularly in the near‐infrared. This review surveys analytical and numerical studies on plasmonic nanoparticle‐enhanced perovskite solar cells (PSCs), clarifying key enhancement mechanisms. The influence of nanoparticle material,
Diogo F. Carvalho +5 more
wiley +1 more source
A RT-FDTD method of analyzing wireless propagation characteristics in underground mine
Scientific ReportsEfficient communication is crucial in reducing injuries and fatalities in coal mine accidents, necessitating the study of simulation methods for mine communication.
Xiaoyan Song, Gaomin Zhang, Chang Zhou
doaj +1 more source