Terahertz wave enhanced transmission through a single subwavelength aperture with periodic surface structures

被引：23
|
作者：
Ishihara, K
Hatakoshi, G
Ikari, T
Minamide, H
Ito, H
Ohashi, K
机构：
[1] NEC Corp Ltd, Fundamental & Environm Res Labs, Tsukuba, Ibaraki 3058501, Japan
[2] Toshiba Res Consulting Corp, Saiwai Ku, Kawasaki, Kanagawa 2128582, Japan
[3] RIKEN, Photodynam Res Ctr, Aoba Ku, Sendai, Miyagi 9800845, Japan
[4] Tohoku Univ, Elect Commun Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2005年 / 44卷 / 28-32期
关键词：
subwavelength aperture; terahertz wave; surface plasmon polariton; enhanced transmission; periodic structure; Bragg reflector;
D O I：
10.1143/JJAP.44.L1005
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate resonantly enhanced transmission of terahertz (THz) wave radiation (gimel similar to 200 mu m) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The phenomenon is caused by the resonant excitation of surface waves, which are known as surface plasmon polaritons in the optical region, generated by the concentric periodic grooves. Strongly enhanced transmission of THz-wave radiation is observed through the single subwavelength circular aperture (diameterd = 100 mu m). We also show that introducing the Bragg reflector to the bull's eye structure results in the further increase of the enhanced transmission.
引用
收藏
页码：L1005 / L1007
页数：3
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