▎ 摘　　要

An ultrathin, flexible metamaterial filter operated at terahertz (THz) frequencies based on one-step CO2 laser-induced graphene (LIG) is proposed. The effects of laser machining parameters on conductivity and THz transmittance of the LIG are investigated, and a bandstop filter is fabricated from an similar to 50 mu m polyimide film using the LIG method with relatively high laser power and scanning speed. At a blocking central frequency of 0.67 THz, the planar filter transmission is similar to 40% with only small variations for different bending angles. The simple, low-cost LIG method enables fabrication of THz metamaterial devices with great potential for THz imaging, sensing, and detection. (C) 2022 Optica Publishing Group