[3] [3] SENSALE-RODRIGUEZ B, YAN R, KELLY M M, et al. Broadband graphene terahertz modulators enabled by intraband transitions［J］. Nature Communications,2012,3:780.

[4] [4] QI Na, ZHANG Zhouyong, XIANG Yuhong. Application of terahertz technology in medical testing and diagnosis［J］. Spectroscopy and Spectral Analysis, 2013, 33(8):2064-2070.

[5] [5] WANG Beixin, ZHAI Xiang, WANG Guizhen, et al. A novel dual-band terahertz metamaterial absorber for a sensor application［J］. Journal of Applied Physics, 2015, 117(1): 014504.

[6] [6] LIANG Dachuan, WEI Minggui, GU Jianqiang, et al. Broad-band time domain terahertz radar cross-section research in scale models［J］.Acta Physica Sinica,2014,63(21): 214102-214102.

[7] [7] MIN W C, SUN H, ZHANG Q, et al. A novel dual-band terahertz metamaterial modulator［J］. Journal of Optics, 2016, 18(6):065103.

[8] [8] WEN Y, MA W, BAILEY J, et al. Broadband terahertz metamaterial absorber based on asymmetric resonators with perfect absorption［J］. IEEE Trans THz Sci Technol, 2015, 5(3):406-411.

[9] [9] JIA X, WANG X. Optical fishnet metamaterial with negative, zero, positive refractive index and nearly perfect absorption behavior at different frequencies［J］. Optik, 2019, 182:464-468.

[10] [10] SREEKANTH K V, SIMPSONR E. Super-collimation and negative refraction in hyperbolic van der Waals superlattices［J］.Optics Communications,2019, 440: 150-154.

[11] [11] LAI G M, WANG Y X, LIU S, et al. Propagation of terahertz wave in left-handed materials and the radar cross section of targets coated with left-handed materials［J］. Waves in Random and Complex Media, 2019:1-11.

[12] [12] WANG X, WANG Q, DONG G, et al. Multi-band terahertz metasurface absorber［J］. Modern Physics Letters B, 2017, 31(36):175035.