Tailoring the slow light behavior in terahertz metasurfaces

被引：143

作者：

Manjappa, Manukumara ^{[1
]}

Chiam, Sher-Yi ^{[2
]}

Cong, Longqing ^{[1
]}

Bettiol, Andrew A. ^{[3
]}

Zhang, Weili ^{[4
]}

Singh, Ranjan ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Ctr Disrupt Photon Technol, Singapore 637371, Singapore

[2] NUS High Sch Math & Sci, Singapore 129957, Singapore

[3] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[4] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 18期

基金：

美国国家科学基金会;

关键词：

ELECTROMAGNETICALLY INDUCED TRANSPARENCY; FANO RESONANCE; ANALOG; METAMATERIALS; NANOSTRUCTURES; INDEX;

D O I：

10.1063/1.4919531

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally study the effect of near field coupling on the transmission of light in terahertz metasurfaces. Our results show that tailoring the coupling between the resonators modulates the amplitude of resulting electromagnetically induced transmission, probed under different types of asymmetries in the coupled system. Observed change in the transmission amplitude is attributed to the change in the amount of destructive interference between the resonators in the vicinity of strong near field coupling. We employ a two-particle model to theoretically study the influence of the coupling between bright and quasi-dark modes on the transmission properties of the system and we find an excellent agreement with our observed results. Adding to the enhanced transmission characteristics, our results provide a deeper insight into the metamaterial analogues of atomic electromagnetically induced transparency and offer an approach to engineer slow light devices, broad-band filters, and attenuators at terahertz frequencies. (C) 2015 AIP Publishing LLC.

引用

页数：5

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