Polarization-dependent thin-film wire-grid reflectarray for terahertz waves

被引：22

作者：

Niu, Tiaoming ^{[1
,2
]}

Upadhyay, Aditi ^{[3
]}

Withayachumnankul, Withawat ^{[1
,4
]}

Headland, Daniel ^{[1
]}

Abbott, Derek ^{[1
]}

Bhaskaran, Madhu ^{[3
]}

Sriram, Sharath ^{[3
]}

Fumeaux, Christophe ^{[1
]}

机构：

[1] Univ Adelaide, Sch Elect & Elect Engn, Adelaide, SA 5005, Australia

[2] Lanzhou Univ, Sch Informat Sci & Engn, Lanzhou 730000, Peoples R China

[3] RMIT Univ, Funct Mat & Microsyst Res Grp, Melbourne, Vic 3001, Australia

[4] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Meguro Ku, Tokyo 1528552, Japan

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

ANTENNAS; NANOANTENNA; DESIGN; BAND;

D O I：

10.1063/1.4927386

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A thin-film polarization-dependent reflectarray based on patterned metallic wire grids is realized at 1 THz. Unlike conventional reflectarrays with resonant elements and a solid metal ground, parallel narrow metal strips with uniform spacing are employed in this design to construct both the radiation elements and the ground plane. For each radiation element, a certain number of thin strips with an identical length are grouped to effectively form a patch resonator with equivalent performance. The ground plane is made of continuous metallic strips, similar to conventional wire-grid polarizers. The structure can deflect incident waves with the polarization parallel to the strips into a designed direction and transmit the orthogonal polarization component. Measured radiation patterns show reasonable deflection efficiency and high polarization discrimination. Utilizing this flexible device approach, similar reflectarray designs can be realized for conformal mounting onto surfaces of cylindrical or spherical devices for terahertz imaging and communications. (C) 2015 AIP Publishing LLC.

引用

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