Observation of off-axis directional beaming via subwavelength asymmetric metallic gratings

被引：19

作者：

Caglayan, H. ^{[1
]}

Bulu, I. ^{[2
]}

Ozbay, E. ^{[1
]}

机构：

[1] Bilkent Univ, Nanotechnol Res Ctr NANOTAM, Dept Phys, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey

[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 04期

关键词：

ANNULAR APERTURE; LIGHT; TRANSMISSION;

D O I：

10.1088/0022-3727/42/4/045105

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It is possible to obtain enhanced and directional beams using subwavelength metallic structures. However, the enhanced beams throughout such structures are only directed towards the propagation direction. In this study, we design the output surface gratings asymmetrically in order to steer the beaming angle. We use a metallic structure with a subwavelength slit (lambda/10) and grating periods of 14mm and 22mm on different sides of the output surface. We demonstrate off-axis directional beaming in the microwave regime with an FWHM of 10. with a beaming angle of 15 degrees. The beaming angle can be changed by arranging the grating periods of the output surface of the metallic structure.

引用

页数：4

共 14 条

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