Propagation characteristics of periodic structures possessing twist and polar glide symmetries

被引:14
|
作者
Dahlberg, Oskar [1 ]
Ghasemifard, Fatemeh [1 ]
Valerio, Guido [2 ]
Quevedo-Teruel, Oscar [1 ]
机构
[1] KTH Royal Inst Technol, Dept Electromagnet Engn, S-10044 Stockholm, Sweden
[2] Sorbonne Univ, Lab Electron & Electromagnetisme, F-75005 Paris, France
关键词
higher symmetry; twist symmetry; polar glide symmetry; broken symmetry; WAVE-GUIDE; 5G COMMUNICATIONS; METASURFACE; LENS;
D O I
10.1051/epjam/2019012
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this article, we provide an overview of the current state of the research in the area of twist symmetry. This symmetry is obtained by introducing multiple periods into the unit cell of a periodic structure through a rotation of consecutive periodic deformations around a symmetry axis. Attractive properties such as significantly reduced frequency dispersion and increased optical density, compared to purely periodic structures, are observed. The direct link between the symmetry order and these properties is illustrated through numerical simulations. Moreover, polar glide symmetry is introduced, and is shown to provide even further control of the dispersion properties of periodic structures, especially when combined with twist symmetry. Twist symmetries can, with benefit, be employed in the development of devices for future communication networks and space applications, where fully metallic structures with accurate control of the dispersion properties are desired.
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页数:6
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