[8] [8] SHI Q,TIAN K,ZHU H,et al. Flexible and giant terahertz modulation based on ultra strain sensitive conductive polymer composites[J]. ACS Applied Materials & Interfaces, 2020,12(8):9790-9796.

[9] [9] VALMORRA F,SCALARI G,MAISSEN C. Low-bias active control of terahertz waves by coupling large-area CVD graphene to a terahertz metamaterial[J]. Nano Letters, 2013,13(7):3193-3198.

[14] [14] LI P. Design of tunable terahertz bandstop filter based on electrostatically actuated reconfigurable metamaterials[J]. Optics Communications, 2017(392):263-267.

[15] [15] WANG J L,WANG X,HAN D. Terahertz wide stop-band metamaterials filter based on metal-dielectric-metal structure[J]. Journal of Infrared and Millimeter Waves, 2019,38(6):722-727.

[16] [16] CHEN X,FAN W. Ultra-flexible polarization-insensitive multiband terahertz metamaterial absorber[J]. Applied Optics, 2015,54(9):2376-2382.

[17] [17] EDWARD D Dalik. Handbook of optical constants of solids[M]. Florida,USA:Academic Press Inc,Orlando, 1985.

[18] [18] FU X,ZENG X,CUI T J,et al. Mode jumping of split-ring resonator metamaterials controlled by high-permittivity BST and incident electric fields[J]. Scientific Reports, 2016,6(1):31274.

[19] [19] WANG Junlin,ZHANG Binzhen,WANG Xin,et al. Flexible dual-band band-stop metamaterials filter for the terahertz region[J]. Optical Materials Express, 2017,7(5):1656-1665.

[20] [20] ZHONG M. Localized surface plasmon resonance induced terahertz broad absorption band[J]. Optics Communications, 2015(356):607-611.