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Abstract
In this work, a metamaterial perfect absorber (MPA) in the microwave region is numerically and experimentally demonstrated based on the near-field coupling of resonators. By decreasing the distance between split-ring resonators (SRRs), the coupling of SRRs is enhanced. Consequently, the original resonance of SRRs splits, leading to a multi-band perfect absorption. In addition, the proposed multi-band MPA is polarization-insensitive and can maintain the high absorption in a wide range of incident angle. Our work is expected to provide a different way to create the potential devices by using the multi-band and the broadband MPAs.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Funding
This work was supported by the NRF fund by MSIP, Korea [No. 2017R1A2B4003916].