Abstract
An optically transparent microwave absorber with broadband absorption based on frequency selective surface (FSS) have been proposed and fabricated using a simple, cost-effective, and controllable inkjet printing assisted patterning technique. The FSS and ground layers are made of silver nanowires (AgNWs) conductive networks with desired patterns. This new device exhibits broadband absorption performance with an optimized 90% absorption bandwidth over the frequency range of 9.1 to 12.2 GHz in X-band. Besides, due to the patterning of AgNWs FSS and ground layers, the optical transmittance of the fabricated absorber exceeds 83% at 550 nm wavelength, which is the highest among the transparent absorbers in literature. Based on the easy-processing, high performance, and excellent transparency, the proposed absorber shows great promise for various applications relating to transparent absorbers, such as photonic detectors, antennas and solar cells.