Propagation through chiroplasma waveguide using perfect magnetic conductor boundary conditions

Analysis of electromagnetic wave propagations in a cylindrical waveguide filled with a chiroplasma core coated with a perfect magnetic conductor is presented. The presented analysis and formulations is generalized for any general isotropic or anisotropic material, including plasma and metamaterials. The characteristic equations are obtained and the behavior of its characteristic curves and the energy flux are examined and evaluated numerically. The obtained results show that the behavior of the energy flux transported in the guide, in magnitude and orientation, is highly affected by the chirality parameter and the plasma and cyclotron frequencies. The mode cut-off frequencies and transported energies are sensitive to the variations in the material parameters, particularly the variations in the chirality parameter.

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High-Directivity Patch Antenna with both Perfect Magnetic Conductor Substrate and Photonic Bandgap Cover

2005 Asia-Pacific Microwave Conference Proceedings ◽

10.1109/apmc.2005.1606209 ◽

2006 ◽

Author(s):

Fangming Zhu ◽

Qingchun Lin

Keyword(s):

Patch Antenna ◽

Photonic Bandgap ◽

Magnetic Conductor ◽

Perfect Magnetic Conductor

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Waves in Microstructured Conducting Sheath Helix Embedded Optical Guides with Chiral Nihility and Chiral Materials

Journal of Nanomaterials ◽

10.1155/2014/362739 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 6

Author(s):

N. Iqbal ◽

M. A. Baqir ◽

P. K. Choudhury

Keyword(s):

Boundary Conditions ◽

Flux Density ◽

Energy Flux ◽

Pitch Angle ◽

Electromagnetic Waves ◽

The Core ◽

Dispersion Behavior ◽

Chiral Materials ◽

Energy Flux Density

The paper deals with the sustainment of electromagnetic waves in circularly cylindrical optical guide with chiral nihility and chiral materials in the core and the clad sections, respectively. A perfectly conducting tightly wound helix is introduced at the core-clad interface. The eigenvalue relation for such a complex optical microstructured guide is deduced by applying suitable boundary conditions at the core-clad interface, and the dispersion behavior is analyzed by varying the pitch angle of helix. The sustainment of energy flux density in such optical guides is estimated under various structural conditions, and the density patterns in core-clad sections are anatomized analytically.

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Boundary conditions for Maxwell fields in Kerr-AdS spacetimes

International Journal of Modern Physics D ◽

10.1142/s021827181641011x ◽

2016 ◽

Vol 25 (09) ◽

pp. 1641011 ◽

Cited By ~ 4

Author(s):

Mengjie Wang

Keyword(s):

Black Holes ◽

Angular Momentum ◽

Boundary Conditions ◽

Energy Flux ◽

Momentum Flux ◽

De Sitter ◽

Perturbative Methods ◽

Flux Boundary Conditions ◽

Maxwell Fields ◽

New Type

Perturbative methods are useful to study the interaction between black holes and test fields. The equation for a perturbation itself, however, is not complete to study such a composed system if we do not assign physically relevant boundary conditions. Recently we have proposed a new type of boundary conditions for Maxwell fields in Kerr-anti-de Sitter (Kerr-AdS) spacetimes, from the viewpoint that the AdS boundary may be regarded as a perfectly reflecting mirror, in the sense that energy flux vanishes asymptotically. In this paper, we prove explicitly that a vanishing energy flux leads to a vanishing angular momentum flux. Thus, these boundary conditions may be dubbed as vanishing flux boundary conditions.

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Electromagnetic wave scattering on imperfect cloaking devices

Science of Sintering ◽

10.2298/sos0803245i ◽

2008 ◽

Vol 40 (3) ◽

pp. 245-250

Author(s):

G. Isic ◽

A. Beltaos ◽

R. Gajic ◽

K. Hingerl

Keyword(s):

Electromagnetic Wave ◽

Scattering Theory ◽

Wave Scattering ◽

Singular Values ◽

Shell Material ◽

Electromagnetic Wave Scattering ◽

Material Parameters ◽

Full Wave ◽

Overall Performance ◽

Theoretical Results

Cloaking devices based on the coordinate transform approach enable, in principle, a perfect concealment of a region in space provided that the material composing the cloaking shell meets certain criteria. To achieve ideal cloaking it is necessary that the shell material parameters have singular values on the surface bounding the cloaked region which is unphysical. In this paper we assume finite values of cloak parameters and apply the scattering theory formalism to give an estimate of the overall performance of an 'imperfect' cloak. We perform full-wave numerical calculations and use our theoretical results to discuss them.

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Optical Textures and Orientational Structures in Cholesteric Droplets with Conical Boundary Conditions

Molecules ◽

10.3390/molecules25071740 ◽

2020 ◽

Vol 25 (7) ◽

pp. 1740 ◽

Cited By ~ 1

Author(s):

Anna P. Gardymova ◽

Mikhail N. Krakhalev ◽

Victor Ya. Zyryanov

Keyword(s):

Boundary Conditions ◽

Surface Defect ◽

Microscopy Technique ◽

Circular Defect ◽

Chirality Parameter ◽

Optical Textures

Cholesteric droplets dispersed in polymer with conical boundary conditions have been studied. The director configurations are identified by the polarising microscopy technique. The axisymmetric twisted axial-bipolar configuration with the surface circular defect at the droplet’s equator is formed at the relative chirality parameter N 0 ≤ 2.9 . The intermediate director configuration with the deformed circular defect is realised at 2.9 < N 0 < 3.95 , and the layer-like structure with the twisted surface defect loop is observed at N 0 ≥ 3.95 . The cholesteric layers in the layer-like structure are slightly distorted although the cholesteric helix is untwisted.

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