Journal
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
Volume 33, Issue 6, Pages 649-656Publisher
SPRINGER
DOI: 10.1007/s10762-012-9906-x
Keywords
Terahertz; Metamaterial; Subwavelength structure; Terahertz time-domain spectroscopy
Funding
- National Natural Science Foundation of China [11174195]
- Science and Technology Commission of Shanghai municipal [09530501100]
- National Key Basic Research Program [2007CB310408]
- National laboratory for infrared physics
- Chinese Academy of Science
- Laboratory for Microstructures of Shanghai University
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We present the design, fabrication, as well as the characterization of the large incident angle and polarization independent terahertz (THz) metamaterial absorber. The designed absorber consists of metallic cross structure and a metallic ground plane separated with a dielectric as a spacer, this structure shows a strong resonance at terahertz frequency. The influences of the structural parameters (including period, cross width and spacer thickness) on the absorption are discussed. An optimized structure is fabricated and characterized, and a good agreement between simulation and experimental result is obtained. The metamaterial absorbers are potential candidates as absorbing elements for terahertz imaging and other fields of terahertz technology.
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