Results 141 to 150 of about 8,562 (255)

New High Precision Measurements of Apollo Samples: 0.3–5 GHz Complex Refractive Indices

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Active and passive radar techniques provide information on the subsurface structure and history of planetary bodies. However, interpretations of radar data are limited by our understanding of the complex dielectric permittivity and magnetic permeability of the surface material.
P. Linton, R. Ghent, P. Gorham, P. Allison, J. J. Beatty, A. Connolly, E. S. Costello, P. Lucey, A. Jung, A. Machtay, K. McBride, C. Miki, E. Oberla, J. Rolla, A. Romero‐Wolf, C. J. Tai Udovicic   +15 more
wiley   +1 more source

Achromatic Petal‐Shaped Beam Generation and Information Encoding Based on Perfect Vortex Beam

Nanophotonics, Volume 15, Issue 10, 27 May 2026.
Based on petal‐shaped beams with controllable topological charge, size, and rotation angle, this work employs a spatially multiplexed all‐dielectric TiO2 transmissive array to numerically achieve achromatic petal‐shaped beams at three wavelengths: 480 nm, 530 nm, and 630 nm. Leveraging their unique intensity distribution and rotational characteristics,
Yilong Ge, Yifeng Wei, Jinqin Cui, Ziben Liu, Yang Liu, Bingxue Zhang, Dandan Wen, Peng Li, Sheng Liu, Jianlin Zhao, Dong Li   +10 more
wiley   +1 more source

Modified Splitting FDTD Methods for Two-Dimensional Maxwell's Equations

, 2020
In this paper, we develop a new method to reduce the error in the splitting finite-difference method of Maxwell's equations. By this method two modified splitting FDTD methods (MS-FDTDI, MS-FDTDII) for the two-dimensional Maxwell equations are ...
Liping Gao, Shouhui Zhai
core  

Flexible Dual Fabry–Perot Filters Enabling Color Balanced Narrowband Emission Designed by Physics Guided Neural Inverse Optimization

Nanophotonics, Volume 15, Issue 10, 27 May 2026.
The dual Fabry–Perot interferometer (DFPI) with functionally separated cavities enables simultaneous RGB peak alignment and spectral rebalancing without subpixel patterning. Multi resonance generation and fine spectral tuning are independently controlled, enhancing the color purity.
Keun Soo Shin, Ki Won Jeong, Yun Seon Do
wiley   +1 more source

Customizable Fully Structured Vector Trajectory Beams in the Focal Plane via a Single‐Layer Metasurface

Nanophotonics, Volume 15, Issue 10, 27 May 2026.
This work introduces a unique class of structured light—trajectory beams—where all degrees of freedom evolve dynamically along the predefined trajectory. By employing computer‐generated holography, single‐layer metasurfaces achieve the complete decoupling of trajectory shape and the distributions of amplitude, phase, and polarization along the path ...
Zhibang Tan, Zebin Chen, Zepeng Chen, Yantao Zheng, Min Ouyang, Wei Hu, Qing Wang, Lijun Wu, Qian Shou   +8 more
wiley   +1 more source

Unified leapfrog CDI-FDTD methods with weakly conditional stability and hybrid implicit-explicit schemes

Recently proposed leapfrog complying-divergence implicit-finite-difference time-domain (CDI-FDTD) method features many advantages over other unconditionally stable FDTD methods, such as unconditional stability, complying-divergence, and efficient ...
Tan, Eng Leong, Liu, Shuo
core   +1 more source

Broadband Stacked Microstrip Patch Antenna for L-Band Operation: FDTD Modeling

Iranian Journal of Electrical and Electronic Engineering, 2007
This paper presents a novel implementation of an electromagnetically coupled patch antenna using air gap filled substrates to achieve the maximum bandwidth.
A. Hajiaboli, Hodjat-Kashani, M. Omidi
doaj  

Impact of Increasing Antenna Model Complexity on Microwave Tomography Using DBIM. [PDF]

Sensors (Basel)
Vasileiou T, Koutsoupidou M, Kosmas P.
europepmc   +1 more source

Investigating the Optical Properties of Gold Nanorods Using Forward and Inverse Design. [PDF]

ACS Omega
Islam S, Mohsin ASM, Bhuian MBH, Rahman MM.   +3 more
europepmc   +1 more source

Vacancy-Engineered Phonon Polaritons in a van der Waals Crystal. [PDF]

ACS Nano
Sakib MA, Hussain N, Stepanova M, Harris W, Bocanegra JJ, Sanchez JD, Velez C, Wu R, Wickramasinghe HK, Shcherbakov MR.   +9 more
europepmc   +1 more source