Optically Transparent Broadband Microwave Absorber by Graphene and Metallic Rings

• DOI: 10.1021/acsami.1c24571
• Publication Date: 2022-04-07T20:33:28Z
• Authors: Limin Ma; Han Xu; Zhengang Lu; Jiubin Tan
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy; 01 natural sciences; 0104 chemical sciences

The demand for optically transparent microwave absorbers has attracted increasing interest among researchers in recent years. However, integrating broadband absorption and high optical transparency remains a challenge. This report demonstrates scheme absorbers, featuring 90% bandwidth of 10 GHz covering frequency range 25.2-35.2 compatibility with good wide band from the visible to infrared. absorber is based on Jaumann structure composed two graphene sheets sandwiched by dielectric backed an arrayed-metallic-rings sheet. Guided derived formulas, this exhibits complete if sheet resistance close 500 Ω sq-1. center spectra can be readily tuned simply via changes thickness between films Moreover, insensitive incident angle radiation achieve near-unity even at oblique incidence. graphene-based proposed herein provides viable solution effectively transparency, thereby enabling widespread applications optics, communications, solar cells.