A Tunable Absorber with Switched Absorption/Transmission Property

In this paper, a tunable absorber with switched absorption/transmission property is presented, which is composed of a dielectric substrate and metamaterials. The microfluidic channel is etched inside the dielectric substrate, and wideband absorption can be achieved when adding liquid water and the absorption peak can reach 99%. While, without adding water, electromagnetic waves can propagate through the periodic planar structure and three transparency bands can be realized. Overall, the state of absorption and transmission can be tuned by changing the structure state. Therefore, it has potential application prospects and great potential applications in the fields of electromagnetic stealth.