Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/626815
Title: Polarization Control by Using Anisotropic 3-D Chiral Structures
Authors: Menglin L. N. Chen;Li Jun Jiang;Wei E. I. Sha;Wallace C. H. Choy;Tatsuo Itoh
subject: circular polarizer|Chiral structure|polarization control
Year: 2016
Publisher: IEEE
Abstract: Due to the mirror symmetry breaking, chiral structures show fantastic electromagnetic (EM) properties involving negative refraction, giant optical activity, circular dichroism and asymmetric transmission. Aligned electric and magnetic dipoles excited in chiral structures contribute to the extraordinary properties. However, the chiral structures that exhibit n-fold rotational symmetry show a limited tunability of the chirality. In this paper, we propose a compact, light, and highly tunable anisotropic chiral structure to overcome this limitation and realize a linear-to-circular polarization conversion. The anisotropy is due to simultaneous excitations of two different pairs of aligned electric and magnetic dipoles. The 3-D omega-shaped structure, etched on two sides of one printed circuit board (PCB) with connecting metallic vias, achieves 60% of linear-to-circular conversion (transmission) efficiency at the operating frequency of 9.2 GHz. The desired 90° phase shift between the two orthogonal linear polarizations is not only from the chirality but also from the anisotropic chiral response slightly off the resonance. The work enables elegant and practical polarization control of EM waves.
URI: http://localhost/handle/Hannan/157574
http://localhost/handle/Hannan/626815
ISSN: 0018-926X
1558-2221
volume: 64
issue: 11
Appears in Collections:2016

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Title: Polarization Control by Using Anisotropic 3-D Chiral Structures
Authors: Menglin L. N. Chen;Li Jun Jiang;Wei E. I. Sha;Wallace C. H. Choy;Tatsuo Itoh
subject: circular polarizer|Chiral structure|polarization control
Year: 2016
Publisher: IEEE
Abstract: Due to the mirror symmetry breaking, chiral structures show fantastic electromagnetic (EM) properties involving negative refraction, giant optical activity, circular dichroism and asymmetric transmission. Aligned electric and magnetic dipoles excited in chiral structures contribute to the extraordinary properties. However, the chiral structures that exhibit n-fold rotational symmetry show a limited tunability of the chirality. In this paper, we propose a compact, light, and highly tunable anisotropic chiral structure to overcome this limitation and realize a linear-to-circular polarization conversion. The anisotropy is due to simultaneous excitations of two different pairs of aligned electric and magnetic dipoles. The 3-D omega-shaped structure, etched on two sides of one printed circuit board (PCB) with connecting metallic vias, achieves 60% of linear-to-circular conversion (transmission) efficiency at the operating frequency of 9.2 GHz. The desired 90° phase shift between the two orthogonal linear polarizations is not only from the chirality but also from the anisotropic chiral response slightly off the resonance. The work enables elegant and practical polarization control of EM waves.
URI: http://localhost/handle/Hannan/157574
http://localhost/handle/Hannan/626815
ISSN: 0018-926X
1558-2221
volume: 64
issue: 11
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7544481.pdf2.48 MBAdobe PDFThumbnail
Preview File
Title: Polarization Control by Using Anisotropic 3-D Chiral Structures
Authors: Menglin L. N. Chen;Li Jun Jiang;Wei E. I. Sha;Wallace C. H. Choy;Tatsuo Itoh
subject: circular polarizer|Chiral structure|polarization control
Year: 2016
Publisher: IEEE
Abstract: Due to the mirror symmetry breaking, chiral structures show fantastic electromagnetic (EM) properties involving negative refraction, giant optical activity, circular dichroism and asymmetric transmission. Aligned electric and magnetic dipoles excited in chiral structures contribute to the extraordinary properties. However, the chiral structures that exhibit n-fold rotational symmetry show a limited tunability of the chirality. In this paper, we propose a compact, light, and highly tunable anisotropic chiral structure to overcome this limitation and realize a linear-to-circular polarization conversion. The anisotropy is due to simultaneous excitations of two different pairs of aligned electric and magnetic dipoles. The 3-D omega-shaped structure, etched on two sides of one printed circuit board (PCB) with connecting metallic vias, achieves 60% of linear-to-circular conversion (transmission) efficiency at the operating frequency of 9.2 GHz. The desired 90° phase shift between the two orthogonal linear polarizations is not only from the chirality but also from the anisotropic chiral response slightly off the resonance. The work enables elegant and practical polarization control of EM waves.
URI: http://localhost/handle/Hannan/157574
http://localhost/handle/Hannan/626815
ISSN: 0018-926X
1558-2221
volume: 64
issue: 11
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7544481.pdf2.48 MBAdobe PDFThumbnail
Preview File