A close-ring pair terahertz metamaterial resonating at normal incidence

作者：Gu Jianqiang^*; Han Jiaguang; Lu Xinchao; Singh Ranjan; Tian Zhen; Xing Qirong; Zhang Weili

来源：Optics Express, 2009, 17(22): 20307-20312.

DOI：10.1364/oe.17.020307

We present a systematic study of a close-ring pair based freestanding metamaterial fabricated by double-layer, self-aligned photolithography. Terahertz time-domain spectroscopy transmission measurements and numerical simulations have revealed negative index of refraction in the frequency range of 0.66-0.90 THz under normal wave incidence. The observed resonance behaviors can be well explained by a theoretical circuit model. The electromagnetic properties and the figure of merit of such close-ring metamaterials are also explored in terms of geometrical parameters of the unit cell with a goal of providing optimized design for three-dimensional metamaterials and potential device applications.

• 出版日期2009-10-26
• 单位天津大学