Results 41 to 50 of about 2,196 (202)
IET Microwaves, Antennas & Propagation, 2021 To obtain high accuracy and efficiency in the simulations, an optimum time step should be taken in finite‐difference time‐domain (FDTD) methods. The authors investigated how time steps impact on numerical dispersion of two FDTD methods including the FDTD(
Yu Cheng +3 more
doaj +1 more source
Performance Improvement of Ultrathin CIGS Solar Cells Using Al Plasmonic Nanoparticles: The Effect of the Position of Nanoparticles [PDF]
Journal of Optoelectronical Nanostructures, 2020 CIGS solar cells are regarded to be one of the best thin film solar cells withefficiencies up to 22.6%, which exceeds the current multicrystalline Si record efficiency(21.9%).
Ali Abdolahzadeh Ziabari +3 more
doaj
Vivid Structural Coloration in Transparent MXene‐Cellulose Nanocrystals Composite Films
Advanced Functional Materials, EarlyView.Vivid structural coloration in reflectance and high transparency in transmittance modes are observed in biopolymer‐layered composite films. The ultrathin multilayered structures have unique optical appearance, near‐infrared bandgap, and strong optical reflection caused by alternating MXene and cellulose nanocrystals layers with high refractive index ...
Botyo Dimitrov +12 more
wiley +1 more source
Investigation of Numerical Dispersion with Time Step of The FDTD Methods: Avoiding Erroneous Conclusions [PDF]
arXiv, 2020 It is widely thought that small time steps lead to small numerical errors in the finite-difference time-domain (FDTD) simulations. In this paper, we investigated how time steps impact on numerical dispersion of two FDTD methods including the FDTD(2,2) method and the FDTD(2,4) method.
arxiv
A Stable FDTD Subgridding Scheme with SBP-SAT for Transient Electromagnetic Analysis [PDF]
arXiv, 2021 We proposed a provably stable FDTD subgridding method for accurate and efficient transient electromagnetic analysis. In the proposed method, several field components are properly added to the boundaries of Yee's grid to make sure that the discrete operators meet the summation-by-parts (SBP) property.
arxiv
Assessment of FDTD accuracy in the compact hemielliptic dielectric lens antenna analysis [PDF]
IEEE Trans. Antennas Propag., vol. 56, no. 3, pp. 758-764, 2008, 2010 The objective of the paper is to assess the accuracy of a standard FDTD code in the analysis of the near and far-field characteristics of two-dimensional models of small-size dielectric lens antennas made of low or high-index materials and fed by the line sources.
arxiv +1 more source
Advanced Functional Materials, EarlyView.Symmetry‐broken plasmonic nanoantenna arrays achieve broadband multiresonant enhancement of second harmonic generation (SHG), third harmonic generation (THG), and upconversion photoluminescence (UCPL), under femtosecond laser excitation across the near‐infrared range (1000–1600 nm).
Elieser Mejia +9 more
wiley +1 more source
Towards the Development of A Three-Dimensional SBP-SAT FDTD Method: Theory and Validation [PDF]
arXiv, 2022 To enhance the scalability and performance of the traditional finite-difference time-domain (FDTD) methods, a three-dimensional summation-by-parts simultaneous approximation term (SBP-SAT) FDTD method is developed to solve complex electromagnetic problems.
arxiv
Design of an Improved Optical Filter Based on Dual-Curved PCRR for WDM Systems [PDF]
Journal of Optoelectronical Nanostructures, 2017 In this paper, an optical filter based on a two dimensional photonic crystalring resonator (PCRR) with triangular lattice is designed and presented. For thispurpose, the effects of positioning, arrangement and the number of the inner rods of thedual ...
Vahid Fallahi, Mahmood Seifouri
doaj
Energy analysis of the ADI-FDTD method with fourth-order accuracy in time for Maxwell's equations
AIMS Mathematics, 2023 In this work, the ADI-FDTD method with fourth-order accuracy in time for the 2-D Maxwell's equations without sources and charges is proposed. We mainly focus on energy analysis of the proposed ADI-FDTD method.
Li Zhang, Maohua Ran, Hanyue Zhang
doaj +1 more source