[1] [1] Xie L J, Yao Y, Ying Y B. The application of terahertz spectroscopy to protein detection: a review［J］. Applied Spectroscopy Reviews, 2014, 49(6): 448-461.

[2] [2] Hangyo M, Tani M, Nagashima T. Terahertz time-domain spectroscopy of solids: a review［J］. International Journal of Infrared & Millimeter Waves, 2005, 26(12):1661-1690.

[3] [3] Kleine-Ostmann T, Nagatsuma T. A review on terahertz communications research［J］. Journal of Infrared, Millimeter, and Terahertz Waves, 2011, 32(2): 143-171.

[4] [4] Mickan S P, Menikh A, Liu H, et al. Label-free bioaffinity detection using terahertz technology［J］. Physics in Medicine & Biology, 2002, 47(21): 3789-3795.

[5] [5] Mittleman D M, Gupta M, Neelamani R, et al. Recent advances in terahertz imaging［J］. Applied Physics B, 1999, 68(6): 1085-1094.

[6] [6] Huang S, Ashworth P C, Kan K W, et al. Improved sample characterization in terahertz reflection imaging and spectroscopy［J］. Optics Express, 2009, 17(5): 3848-3854.

[7] [7] Veselago V G. The electrodynamics of substances with simultaneously negative values of ε and μ［J］. Soviet Physics Uspekhi, 1968, 10(4): 509.

[8] [8] Soukoulis C M, Wegener M. Past achievements and future challenges in the development of three-dimensional photonic metamaterials［J］. Nature Photonics, 2011, 5(9): 523-530.

[9] [9] Melo A M, Kornberg M A, Kaufmann P, et al. Metal mesh resonant filters for terahertz frequencies［J］. Applied Optics, 2008, 47(32): 6064-6069.

[10] [10] Liu Z W, Lee H, Xiong Y, et al. Far-field optical hyperlens magnifying sub-diffraction-limited objects［J］. Science, 2007, 315(5819): 1686.

[11] [11] Chen H T, Padilla W J, Zide J M, et al. Active terahertz metamaterial devices［J］. Nature, 2006, 444(7119): 597-600.

[12] [12] Li J S. High absorption terahertz-wave absorber consisting of dual-C metamaterial structure［J］. Microwave & Optical Technology Letters, 2013, 55(5): 1185-1189.

[13] [13] Grant J, Ma Y, Saha S, et al. Polarization insensitive, broadband terahertz metamaterial absorber［J］. Optics Letters, 2011, 36(17): 3476-3478.

[14] [14] Huang L, Chowdhury D R, Ramani S, et al. Experimental demonstration of terahertz metamaterial absorbers with a broad and flat high absorption band［J］. Optics Letters, 2012, 37(2): 154-156.

[15] [15] Paul O, Beigang R, Rahm M. Highly selective terahertz bandpass filters based on trapped mode excitation［J］. Optics Express, 2009, 17(21): 18590-18595.

[16] [16] Pendry J B, Valanju A P, Valanju P M. Extremely low frequency plasmons in metallic mesostructures［J］. Physical Review Letters, 1996, 76(25): 4473-4476.

[17] [17] Li Z Y, Ma Y F, Huang R, et al. Manipulating the plasmon-induced transparency in terahertz metamaterials［J］. Optics Express, 2011, 19(9): 8912-8919.

[18] [18] Ding Yuan, Zhu Junwei, Guo Yuhan, et al. Experimental study of resonance characteristics of split ring resonators in terahertz band［J］. Acta Optica Sinica, 2015, 35(2): 0216002.

[19] [19] Sun Yaru, Shi Tonglu, Liu Jianjun, et al. Terahertz label-free bio-sensing with EIT-like metamaterials［J］. Acta Optica Sinica, 2016, 36(3): 0328001.

[20] [20] Xing Wei, Yan Fengping, Tan Siyu, et al. Simulation analysis on the designing of high-Q terahertz metamaterials［J］. Chinese J Lasers, 2016, 43(1): 0106005.

[21] [21] Gu J, Singh R, Azad A K, et al. An active hybrid plasmonic metamaterial［J］. Optical Materials Express, 2012, 2(1): 31-37.

[22] [22] Khalid A, Cumming D R S, Drysdale T D, et al. Direct fabrication of terahertz optical devices on low-absorption polymer substrates［J］. Optics Letters, 2009, 34(10): 1555-1557.

[23] [23] Sun L, Lü Z H, Wu W, et al. Double-grating polarizer for terahertz radiation with high extinction ratio［J］. Applied Optics, 2010, 49(11): 2066-2071.

[24] [24] Shchegolkov D Y, Azad A K, O′Hara J F, et al. Perfect subwavelength fishnetlike metamaterial-based film terahertz absorbers［J］. Physical Review B, 2010, 82(20): 205117.