Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials

被引：266

作者：

Cao, Wei ^{[2
]}

Singh, Ranjan ^{[1
]}

Al-Naib, Ibraheem A. I. ^{[3
]}

He, Mingxia ^{[4
,5
]}

Taylor, Antoinette J. ^{[1
]}

Zhang, Weili ^{[2
]}

机构：

[1] Los Alamos Natl Lab, Mat Phys & Applicat Div, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

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

[3] INRS EMT, Varennes, PQ J3X 1S2, Canada

[4] Tianjin Univ, Ctr Terahertz Waves, Tianjin 300072, Peoples R China

[5] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

来源：

OPTICS LETTERS | 2012年 / 37卷 / 16期

基金：

美国国家科学基金会; 美国能源部;

关键词：

PLANAR TERAHERTZ METAMATERIALS; RESONANCES;

D O I：

10.1364/OL.37.003366

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally demonstrate a planar terahertz Fano metamaterial with an ultrahigh quality (Q) factor of 227. This is achieved by the excitation of the nonradiative dark modes by introducing a tiny asymmetry in the metamaterial structure. The extremely sharp quadrupole and Fano resonances are excited at normal incidence for orthogonal polarizations of the electric field. In order to capture the narrow linewidth of the dark resonance modes, we perform high resolution terahertz time-domain measurements with a scan length of 200 picoseconds and frequency resolution of 5 GHz. These high-Q metamaterials can be used in ultrasensitive label-free terahertz sensing, dense photonic integration, and narrowband filtering. (C) 2012 Optical Society of America

引用

页码：3366 / 3368

页数：3

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