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Li Huang 1*, Beibei Zeng 2, Chun-Chieh Chang 2 and Hou-Tong Chen 2*
1 Physics Department, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
2 Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
*1 Email: lihuang2002@hit.edu.cn , *2 Email: chenht@lanl.gov
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Abstract: Metamaterials/metasurfaces have enabled unprecedented manipulation of electromagnetic waves. Here we present a new design of metasurface structure functioning as antireflection coatings. The structure consists of a subwavelength metallic mesh capped with a thin dielectric layer on top of a substrate. By tailoring the geometric parameters of the metallic mesh and the refractive index and thickness of the capping dielectric film, reflection from the substrate can be completely eliminated at a specific frequency. Compared to traditional methods such as coatings with single- or multi-layer dielectric films, the metasurface antireflection coatings are much thinner and the requirement of index matching is largely lifted. This approach is particularly suitable for antireflection coatings in the technically challenging terahertz frequency range and is also applicable in other frequency regimes.
Keywords: Metasurfaces, Antireflection coatings, Terahertz, Interference.
Received: 2015-8-15
Published: 2016-3-30
Cite this article:
Li Huang, Beibei Zeng, Chun-Chieh Chang and Hou-Tong Chen. Terahertz antireflection coating enabled by a subwavelength metallic mesh capped with a thin dielectric film[J]. International Journal of Terahertz Science and Technology, 2016, Vol.9, No.1: 1-9. DOI:10.11906/TST.001-009.2016.03.01
URL: http://www.tstnetwork.org/10.11906/TST.001-009.2016.03.01
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