Results 91 to 100 of about 64,191 (298)

FDTD Simulation of Thermal Noise in Open Cavities

open access: yes, 2008
A numerical model based on the finite-difference time-domain (FDTD) method is developed to simulate thermal noise in open cavities owing to output coupling.
A. E. Siegman   +11 more
core   +1 more source

Circularly Polarized Polariton Lasing from Spin‐Momentum Locking in Deformed Plasmonic Kagome Cavities

open access: yesAdvanced Materials, EarlyView.
This paper describes room‐temperature polariton lasing with high circular polarization from deformed plasmonic Kagome lattice cavities strongly coupled to colloidal CdSe nanoplatelets. Spin‐selectivity from cavity modes resulted in control over the handedness of circular polarization as well as the direction of polariton lasing, opening prospects for ...
Zhaoyun Zheng   +6 more
wiley   +1 more source

Optical Polarization Response of Hybrid Gratings Made of Metals and Polymers Based on Bruggeman Theory

open access: yesCumhuriyet Science Journal
In the current state of the art of grating designs, compositions involving different metals and polymers have not been adequately addressed. Our study aims to fill this gap by investigating the influence of varying material compositions on polarization ...
Talha Erdem, Emirhan Taze
doaj   +1 more source

Design of an Improved Optical Filter Based on Dual-Curved PCRR for WDM Systems [PDF]

open access: yesJournal 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  

Ultralow‐Frequency Epsilon‐Near‐Zero States in 3D‐Printed High‐Entropy Alloy Metacomposites for Ultra‐Thin Perfect RF Absorption

open access: yesAdvanced Materials, EarlyView.
Rozanov causality limit—a compulsive proportional thickness‐wavelength relationship (nd ∝ λ)—makes it challenging to develop perfect absorption with both thin thickness and low frequency. Herein, a cocktail effect in high‐entropy alloys (HEA) is crucially utilized for lowering plasma frequency to achieve epsilon‐near‐zero states, which finally enables ...
Peitao Xie   +7 more
wiley   +1 more source

Simulation of interaction of antennas in the near zone

open access: yesВісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка
Relevance. Obtaining the minimization or maximization of the interaction between the radiating and receiving antennas (or the receiving antenna with fields reflected from some obstacle) due to the orientation and location of the antennas at a certain ...
М. Legenkiy, V. Khrychov
doaj   +1 more source

Direct-Splitting-Based CN-FDTD for Modeling 2D Material Nanostructure Problems

open access: yesIEEE Open Journal of Antennas and Propagation, 2020
Incorporating a truncation of the complex-frequency-shifted perfectly matched layer (CFS-PML), the direct-splitting- based Crank-Nicolson finite-difference time-domain (CNDS-FDTD) is developed and applied to the infrared two-dimensional layered material (
Naixing Feng   +5 more
doaj   +1 more source

FDTD modelling of reverberation chamber

open access: yesElectronics Letters, 2005
The finite-difference time-domain (FDTD) method is applied to the simulation of a reverberation chamber. The real losses of the reverberation chamber are taken into account in a post-treatment process. The predicted results are compared with measured data and good agreement is reported.
Bonnet, Pierre   +3 more
openaire   +3 more sources

Dynamic Optical Lattices Through Conducting Polymer‐Gated Confinement

open access: yesAdvanced Materials, EarlyView.
The conducting polymer gate is incorporated into organic dielectric lattices to control the dynamic switching of nonlocal Mie resonances in the visible/NIR regions. The “closed gate” from oxidized PEDOT confines the light within dielectric nanocylinders and activates nonlocal Mie resonances, while the “opened gate” from reduced PEDOT facilitates ...
Dongqing Lin   +3 more
wiley   +1 more source

Transformation Optics-Based Finite Difference Time Domain Algorithm for Scattering From Object With Thin Dielectric Coating

open access: yesIEEE Access, 2019
A proper dielectric coating can reduce the electromagnetic scattering of the conducting object significantly so that it cannot be detected by the radar.
Ruonan Chen   +3 more
doaj   +1 more source

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