Transparent and Flexible Absorber with Dynamically Frequency Modulation Using Graphene

In this paper, a transparent and flexible absorber using graphene is presented, in which the frequency of the resonant absorption can be modulated in Ku band. The proposed absorber contains a four-layer structure including the patterned graphene capacitor, the periodical striper layer, the polydimethylsiloxane (PDMS) layer and a metallic wire grid ground. By tuning the bias voltage applying to the graphene capacitor, the resonance frequency can be dynamically and continuously shifted from 16.7GHz to 14.6GHz according to the experimental measurement. The optically transparent and structurally flexible characteristics provide more flexibility for applications in electromagnetic stealth and electromagnetic protection of transparent optical components.