Numerical Homogenization for Effective Permittivity of Composite Dielectrics in Waveguide by the Finite Element Method

2018 ◽  
Author(s):  
Tuptim Angkaew
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Effective Permittivity ◽  
Numerical Homogenization ◽  
The Finite Element Method ◽  
Element Method

Simulation and Analysis of Electromagnetic Wave Manipulation by Material with Permittivity and Permeability Very near Zero

2013 ◽  
Vol 538 ◽  
pp. 101-104
Author(s):  
Lin Zhao ◽  
Zhi Gang Zhang ◽  
Lei Ding ◽  
Fneg Nie
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Wave ◽  
Effective Permittivity ◽  
Propagation Direction ◽  
Electromagnetic Properties ◽  
Phase Front ◽  
The Finite Element Method ◽  
Permittivity And Permeability ◽  
Element Method

Electromagnetic properties of the material with effective permittivity and permeability very near zero (double-near-zero, DNZ) have been simulated based on the finite element method and analyzed all-around. The results of simulation show that DNZ can be used to reshape the phase front of a wave perfectly. It can be used as an angular filter as well. Furthermore, The propagation direction and the shape of phase front of EM wave can be controlled by the device which is constructed by DNZ.

A Three-Dimensional Numerical Analysis on the Effective Permittivity of Composites Including Ellipsoids

2013 ◽  
Vol 483 ◽  
pp. 23-27
Author(s):  
De Yuan Zhang ◽  
Li Ming Yuan ◽  
Yong Gang Xu ◽  
Jun Cai
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Models ◽  
Effective Permittivity ◽  
Three Dimensional ◽  
Comsol Multiphysics ◽  
Three Dimension ◽  
The Finite Element Method ◽  
Modeling Software ◽  
Element Method

To investigate the effective permittivity of composites composed of ellipsoidal inclusions, three-dimension numerical models for ellipsoidal inclusions distributed randomly are built with the finite-element modeling software Comsol Multiphysics. After calculating the effective permittivity for different cases and comparing the results with analytical results from the Maxwell-Garnett mixing rule, we find that the finite-element method has an advantage in detecting details of the interaction among inclusions, which have some impacts on the effective permittivity and could not be accurately taken into account in the analytical model. The finite-element method is expected to solve more complex problems on electromagnetic computation.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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