Abstract
An ultrathin, flexible metamaterial filter operated at terahertz (THz) frequencies based on one-step ${{\rm{CO}}_2}$ 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 ${\sim}{{50}} \;{{\unicode{x00B5}{\rm m}}}$ 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 ${\sim}{{40}}\%$ 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.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Zongyuan Wang, Guocui Wang, Weiguang Liu, Bin Hu, Juan Liu, and Yan Zhang
J. Opt. Soc. Am. B 37(2) 546-551 (2020)
Pei-Jung Wu, Wei-Cheng Tsai, and Chan-Shan Yang
Opt. Express 31(1) 469-478 (2023)
Xiu-Yan Fu, Yu-Yin Zhang, Chang-Jing Ma, and Hao-Bo Jiang
Opt. Lett. 47(6) 1502-1505 (2022)