Metamirror for Generation and Control of Bessel Beam

Bessel beams have attracted considerable interests due to their intriguing non-diffracting and self-healing properties. An electronically-engineered metamirror is designed for the flexible control of Bessel beams over a broad frequency band ranging from 9 GHz to 12 GHz. Several configurations are presented to illustrate the non-diffracting features of Bessel beams. The self-healing property is verified by placing a metallic obstacle in the propagation path of the Bessel beam. Owing to the flexible manipulation capabilities, wide bandwidth and highefficiency properties of the reconfigurable metamirror, the proposed Bessel beam generation device opens the door to potential applications for focusing and wireless power transmission.