Midinfrared metamaterials fabricated by nanoimprint lithography

• Published in: Applied physics letters Vol. 90; no. 6; pp. 063107 - 063107-3
• Main Authors: Wu, Wei, Yu, Zhaoning, Wang, Shih-Yuan, Williams, R. Stanley, Liu, Yongmin, Sun, Cheng, Zhang, Xiang, Kim, Evgenia, Shen, Y. Ron, Fang, Nicholas X.
• Format: Journal Article
• Language: English
• Published: American Institute of Physics 05-02-2007
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.2450651

A metamaterial comprising an ordered array of four metallic L-shaped components designed to operate in the mid-IR frequency regime has been fabricated and characterized. The fourfold rotational symmetry of the unit cell should suppress the undesirable bianisotropy observed for split-ring resonators. Nanoimprint lithography was used to demonstrate scalability for mass production. A dipole plasmon resonance with a negative permittivity and a magnetic resonance with a negative permeability were observed at wavelengths of 3.7 and
5.25
μ
m
, respectively, in agreement with theoretical predictions.