Results 91 to 100 of about 2,196 (202)
Error between unconditionally stable FDTD methods and conventional FDTD method
Electronics Letters, 2006 Both the ADI-FDTD method and the CN-FDTD method can be viewed as approximate factorisation of the conventional FDTD scheme, so the error between these methods and the conventional FDTD method is obtained. It is shown that the error is associated with the time step size, the permittivity and the permeability of the medium, and the spatial variation rate
Jiafu Wang, Juan Chen
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IEEE Access, 2018 Based on the explicit finite-difference time-domain (FDTD) and implicit Crank–Nicolson (CN) FDTD methods, this paper presents a hybrid sub-gridded scheme whose time step size depends on the coarse grid size for numerically simulating the 3-D ...
Xiao-Kun Wei, Wei Shao, Xiao-Hua Wang
doaj +1 more source
Angle‐ and Polarization‐Tolerant Metasurface Designs Based on the Aperiodic Tiling
Advanced Optical Materials, EarlyView.A novel aperiodic metasurface design is introduced to mitigate the inherent angle and polarization sensitivity of conventional metasurfaces. By employing a recently discovered aperiodic tiling approach, identical elliptical scatterers are arranged with systematic variations in their spacing and orientation, effectively minimizing spectral reflectance ...
Minyeul Lee, Suwan Jeon, Jonghwa Shin
wiley +1 more source
A comparison of FDTD-PML with TDIE
IEEE Transactions on Antennas and Propagation, 2002 Presented in this paper, is a comparison of two popular numerical techniques, viz. the finite-difference time-domain method and the time domain integral equation method, for electromagnetic-scattering problems. The comparison is made via standard canonical shapes, a cube, and a sphere, to address the factors affecting accuracy, efficiency, and the ...
Sachdeva, Niraj +2 more
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Model of light bullet propagation in LiF crystal
Компьютерная оптикаA numerical model is developed for simulation of the propagation of a light bullet in LiF crystal and the formation of a colored track. The model reproduces the previously observed longitudinal oscillations in the concentration of color centers in the ...
A.V. Kuznetsov
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Carbonized Polymer Dots‐Based Spectrally Adaptable Photonic Microbarcodes
Advanced Optical Materials, EarlyView.This study explores spectrally tunable photonics barcodes using carbonized polymer dots (CPDs) based on whispering gallery mode (WGM) photoluminescence. CPDs offer wavelength‐dependent emission from visible to near‐infrared (NIR), thereby enabling variable WGM emissions.
Barun Kumar Barman +2 more
wiley +1 more source
Advanced Photonics Research, EarlyView.Multipole interference (MPI) plays pivotal roles in electromagnetics. In optics, it has been realized typically with the Mie resonance in high‐index, deep‐subwavelength‐scale dielectric resonators. A new, diffraction‐based MPI scheme is proposed and demonstrated with low‐index, mesoscale dielectric structures.
Rabiul Islam Sikder +2 more
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Nano Select, Volume 3, Issue 12, Page 1549-1556, December 2022., 2022 We study the hydrogenation of Pd membranes on an elastic substrate. Through the hydrogen‐induced surface wrinkling, the hydrogenated process is directly observed by the naked eye in situ and in real‐time. Based on this investigation, a high‐performance hydrogen sensor is achieved by a Pd nanostripe array on an elastic substrate.
Xiaoyi She +3 more
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Directional Whispering Gallery Mode in Microring Lasers Enabled by Tilted Azimuthal Gratings
Advanced Photonics Research, EarlyView.The chiral light propagation in microring lasers with active cladding, enabled by tilted azimuthal gratings, is illustrated. The symmetry of the whispering gallery mode is disrupted due to scattering losses that are determined by the tilted angle, resulting in distinct clockwise and counterclockwise light propagation, and enabling controlled chirality ...
Jinghan Chen +6 more
wiley +1 more source
Spatially Controlled Optical Vortex Generation Using Low‐Loss Antimony Telluride Metasurfaces
Advanced Photonics Research, EarlyView.The spatially varying vortex beams with the customizable propagation trajectory and the controllable topological charge evolution are demonstrated using the Sb2Te3‐based plasmonic metasurfaces. Benefiting from the dispersion‐free property of the Pancharatnam–Berry phase and the broadband response of polarization conversion efficiency of the nanobrick ...
Chengsen Yang +11 more
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