Water-Resonator-Based Metasurface: An Ultrabroadband and Near-Unity Absorption

Qinghua Song, Wu Zhang, Pin Chieh Wu, Weiming Zhu, Zhong Xiang Shen, Peter Han Joo Chong, Qing Xuan Liang, Zhen Chuan Yang, Yi Long Hao, Hong Cai, Hai Feng Zhou, Yuandong Gu, Guo Qiang Lo, Din Ping Tsai, Tarik Bourouina, Yamin Leprince-Wang, Ai Qun Liu

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Abstract

Metasurface absorbing material, which obtains near-unity electromagnetic absorption through subwavelength artificial structure, plays an important role in the area of stealth and shielding technology, biological imaging, etc. However, they usually suffer from narrow bandwidth and only work on planar surfaces. Here, for the first time, this study demonstrates a soft water-resonator-based metasurface, which functions as an active absorbing material across an ultrabroadband range of Ku, K, and Ka bands. Distinct from conventional metallic metasurface, the water-resonator-based metasurface absorbs the microwave by dielectric magnetic resonance and periodic grating effect, which has a perfect absorptivity of ≈99% and an absorption bandwidth (absorptivity higher than 90%) that covers 78.9% of the central frequency. Furthermore, near-unity absorption is maintained when the soft metasurface material is bent into different curvatures, promising high potential applications for antennas in reducing side lobe radiation, eliminating wall reflection in anechoic chambers, antiradar detection, and stealth.

Original languageEnglish
Article number1601103
JournalAdvanced Optical Materials
Volume5
Issue number8
DOIs
Publication statusPublished - 2017 Apr 18

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Song, Q., Zhang, W., Wu, P. C., Zhu, W., Shen, Z. X., Chong, P. H. J., Liang, Q. X., Yang, Z. C., Hao, Y. L., Cai, H., Zhou, H. F., Gu, Y., Lo, G. Q., Tsai, D. P., Bourouina, T., Leprince-Wang, Y., & Liu, A. Q. (2017). Water-Resonator-Based Metasurface: An Ultrabroadband and Near-Unity Absorption. Advanced Optical Materials, 5(8), [1601103]. https://doi.org/10.1002/adom.201601103