Electromagnetic shielding Effect of chiral and typical materials

Oussaid, Rachid

doi:10.1109/icces.2008.4773021

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Electromagnetic scattering properties of cylindrical geometry have been extensively explored in various materials, environments and configurations [9][10][11]. Similarly electromagnetic properties of chiral media has been explored extensively as well [12][13][14][15][16] TI cylinders in chiral media remain to be studied, and therefore in present paper we present our work on TI cylinder in chiral media. Also we have extended the work of Shoukat et al [17] on one hand and Zeng et al [7] on the other, Shoukat et al have studied the electromagnetic scattering from the circular cylinders of different materials like chiral, chiral-nihility, perfect electric conductor (PEC) and perfect magnetic conductor (PMC) surrounded by unbounded chiral medium.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic scattering from a topological insulator cylinder placed in chiral medium

Ashraf

Ahmed

Syed

et al. 2015

JAE

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We study the scattering of time harmonic electromagnetic plane wave from a topological insulator circular cylinder in chiral medium. Variation of scattering behavior for different values of radii and permittivity of the cylinder is noted when time reversal symmetry is protected and we also studied the scattering behavior when time reversal symmetry is broken. Although scattering behavior of co-polarized component of field is not significantly different from chiral cylinder in chiral medium yet it is found that the same, when time reversal symmetry broken, is similar to scattering from a perfect conductors. Scattering behaviour of cross-polarized field component of topological cylinder in chiral medium is remarkably different from chiral cylinder i.e. it has stronger scattering possibly due to the presence of conducting states near the surface. Moreover, it is noted that the scattering in forward direction for cross-polarized and co-polarized components are not correlated with permittivity but for carefully selected values of permittivity, we can control the scattering behavior of topological insulator circular cylinder.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic scattering from a topological insulator cylinder placed in chiral medium

Ashraf

Ahmed

Syed

et al. 2015

JAE

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“…Electromagnetic waves propagation from anisotropic chiral materials had been studied in [22]. Shielding effects of chiral materials with other typical materials had been studied in [23]. Behavior of anisotropic uniaxial chiral slab placed in isotropic chiral media had been studied and discussed the dependance of reflected and transmitted power on material parameters in [24].…”

Section: Introductionmentioning

confidence: 99%

Effects on reflected and transmitted powers of planar stratified structures involving chiral nihility metamaterials

Shah

Ahmad

Syed

et al. 2013

JAE

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Behavior of different planar multilayer periodic structures due to plane wave excitation has been studied using the transfer matrix method. Multilayer structure is composed of odd number of slabs and the layers at odd locations have same characteristics and layers at even locations have same characteristics. For each structure, layers at odd locations are of chiral nihility metamaterial whereas three different cases are considered for layers at even locations, i.e., dielectric, chiral and chiral nihility. Effects of polarization rotation due to the optical activity of material's chirality is studied with respect angle of incidence and frequency in THz region. Chiral nihility adds property of transparency to the structure for normal incidence. Chiral nihility-chiral nihility structure for normal incidence yields transparency whereas same structure for oblique incidence yields total rejection at higher frequencies. . N.A. Shah et al. / Effects on reflected and transmitted powers of planar stratified structurescomposed of nihility metamaterial [5]. Later, Tretyakov et al. extended the concept of nihility for the isotropic chiral metamaterials [6]. Chiral nihility (CN) is a special case of chiral metamaterial for which real part of permittivity and permeability are simultaneously zero at certain frequency, i.e., −→ 0 and μ −→ 0. The constitutive relations for CN metamaterials are [6][7][8],

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“…Consequently, several interesting phenomena were observed and thus related applications suggested. A chiral medium is a reciprocal medium characterized by a three-parameter model [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Chiral mediums are bi-isotropics representing reciprocally the coupling between the electrical (D, E) and magnetic (B, H) quantities.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic shielding effect of chiral and typical materials

Oussaid

2010

JAE

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In this paper, we present a theoretical study of plane waves in chiral media. We are particularly interested in designing and analyzing chiral devices to quantify their shielding effectiveness as a function of frequency. The typical shielding materials used in this study are copper, aluminium and steel. We have also conducted a comparative study between these different types of materials. Due to chirality, there is magnetoelectric coupling. The electric and magnetic shielding effects are shown to be function of the three material parameters (ε, µ, κ). We found that, at normal incident angle, reflection occurs similar to that of isotropic medium. The cross-polarization effects caused by the chirality appear at oblique wave incidence.

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Electromagnetic shielding Effect of chiral and typical materials

Cited by 4 publications

References 13 publications

Electromagnetic scattering from a topological insulator cylinder placed in chiral medium

Electromagnetic scattering from a topological insulator cylinder placed in chiral medium

Effects on reflected and transmitted powers of planar stratified structures involving chiral nihility metamaterials

Electromagnetic shielding effect of chiral and typical materials

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