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

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

Advanced Optical Materials

10.1002/adom.201601103

https://doi.org/10.1002/adom.201601103

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

21 March 2017

Song, Q. H., Zhang, W., Wu, P. C., Zhu, W. M., Shen, Z. X., Chong, P. H. J., Liang, Q. X., Yang, Z. C., Hao, Y. L., Cai, H., Zhou, H. F., Gu, Y. D., Lo, G.‐Q., Tsai, D. P., Bourouina, T., Leprince‐Wang, Y., Liu, A.‐Q., Advanced Optical Materials 2017, 5, 1601103.

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.

PublisherCopyrights

https://oar.a-star.edu.sg/communities-collections/articles/14649

2195-1071

Institute of Microelectronics