Mechanically tunable multi-band terahertz absorber based on overlapping graphene nanoribbon arrays

• DOI: 10.1016/j.rinp.2023.106817
• Publication Date: 2023-08-01T01:21:48Z
• Authors: Rong Cheng; Yuxiu Zhou; Xinghua Wu; Qingkai Wang; Jianqiang Liu
• Keywords: Graphene nanoribbon; Multi-band; Physics; QC1-999; Terahertz; 0103 physical sciences; Absorber; Mechanical tuning; 01 natural sciences

With promising applications in broadband communication, terahertz (THz) imaging, biochemical sensing, nondestructive testing and other fields, THz absorbers have become a hot research topic recent years. Although number of graphene-based multi-band with tunable performances been reported, the tuning methods are mostly limited to electrical tuning. Here, we report mechanically absorber, which is based on overlapping graphene nanoribbon arrays. By adjusting horizontal position upper cover plate array, frequencies absorption peaks can be tuned wide range. In addition originating from even-order lateral Fabry-Pérot resonance (LFPR) modes, there also inductor-capacitor (LC) oscillations. An equivalent LC circuit model developed theoretical results match well simulated values. The proposed absorber may provide reference for that applied various fields.