Enhanced broadband absorption with a twisted multilayer metal–dielectric stacking metamaterial. Issue 16 (21st July 2021)

• Record Type: Journal Article
• Authors: Deng, Guangsheng; Sun, Hanxiao; Lv, Kun; Yang, Jun; Yin, Zhiping; Li, Ying; Chi, Baihong
• Is Part Of: Nanoscale advances. Volume 3:Issue 16(2021)
• Page Start: 4804
• Page End: 4809
• Publication Date: 2021-07-21
• Subjects: 620.5
• DOI: 10.1039/d1na00372k
• Languages: English
• ISSNs: 2516-0230

Abstract

Abstract : By individually rotating each stacking layer at a certain angle, the absorption bandwidth of the metamaterial can be effectively enlarged. Abstract : This study proposes and experimentally demonstrates enhanced broadband absorption with twisted multilayer metal–dielectric stacking. Compared with the traditional metal–dielectric pyramid, the resonance frequencies of the third-order magnetic resonances in the twisted quadrangular frustum redshifted obviously. Hence, the proposed structure enables an ultra-broadband absorption by combining the third-order magnetic resonances with the fundamental mode. The broadband absorption is insensitive to the incident wave polarization, whereas the twisted angle of the stacking plays an important role in deciding the absorption bandwidth. The sample was fabricated via the multi-material hybrid micro-droplet jetting modeling (MHMJM) technology to verify the enhanced absorbing performance. The measured results suggest that the proposed strategy provides a potential path to realize broadband electromagnetic wave absorption. Moreover, it is possible to extend the twisted metamaterial to the terahertz and infrared frequencies using the advanced nano fabrication techniques.