Bilayer metasurfaces for dual-and broadband optical antireflection

Li Huang*, Chun Chieh Chang, Beibei Zeng, John Nogan, Sheng Nian Luo, Antoinette J. Taylor, Abul K. Azad, Hou Tong Chen

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

34 引文 斯高帕斯(Scopus)

摘要

Optical antireflection has long been pursued for a wide range of applications, but existing approaches encounter issues in the performance, bandwidth, and structure complexity, particularly in the long-wavelength infrared regime. Here we present the demonstration of bilayer metasurfaces that accomplish dual-and broadband optical antireflection in the terahertz and mid-infrared spectral ranges. By simply tailoring the structural geometry and dimensions, we show that subwavelength metal/dielectric structures enable dramatic reduction of Fresnel reflection and significant enhancement of transmission at a substrate surface, operating either at two discrete narrow bands or over a broad bandwidth up to 28%. We also use a semianalytical interference model to interpret the obtained results, in which we find that the dispersion of the constituent structures plays a critical role in achieving the observed broadband optical antireflection.

原文英語
頁(從 - 到)2111-2116
頁數6
期刊ACS Photonics
4
發行號9
DOIs
出版狀態已發佈 - 2017 9月 20
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 生物技術
  • 原子與分子物理與光學
  • 電氣與電子工程

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