Premium
Water‐Resonator‐Based Metasurface: An Ultrabroadband and Near‐Unity Absorption
Author(s) -
Song Qinghua,
Zhang Wu,
Wu Pin Chieh,
Zhu Weiming,
Shen Zhong Xiang,
Chong Peter Han Joo,
Liang Qing Xuan,
Yang Zhen Chuan,
Hao Yi Long,
Cai Hong,
Zhou Hai Feng,
Gu Yuandong,
Lo GuoQiang,
Tsai Din Ping,
Bourouina Tarik,
LeprinceWang Yamin,
Liu AiQun
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201601103
Subject(s) - optics , microwave , resonator , materials science , anechoic chamber , absorption (acoustics) , bandwidth (computing) , electromagnetic radiation , attenuation , molar absorptivity , planar , dielectric , electromagnetic shielding , reflection loss , radiation , optoelectronics , physics , acoustics , telecommunications , composite material , computer graphics (images) , quantum mechanics , computer science
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.