[1] Landy N I, Sajuyigbe S, Mock J J et al. Perfect metamaterial absorber[J]. Physical Review Letters, 100, 207402(2008).

[2] Schurig D, Mock J J, Justice B J et al. Metamaterial electromagnetic cloak at microwave frequencies[J]. Science, 314, 977-980(2006). http://europepmc.org/abstract/MED/17053110

[3] Wu D, Liu Y, Li R et al. Infrared perfect ultra-narrow band absorber as plasmonic sensor[J]. Nanoscale Research Letters, 11, 483(2016). http://link.springer.com/10.1186/s11671-016-1705-1

[4] Karaaslan M. Ba g˙manc? M, ünal E, et al. Microwave energy harvesting based on metamaterial absorbers with multi-layered square split rings for wireless communications [J]. Optics Communications, 392, 31-38(2017).

[5] Astorino M D, Frezza F, Tedeschi N. Ultra-thin narrow-band, complementary narrow-band, and dual-band metamaterial absorbers for applications in the THz regime[J]. Journal of Applied Physics, 121, 063103(2017).

[6] Liu N, Mesch M, Weiss T et al. Infrared perfect absorber and its application as plasmonic sensor[J]. Nano Letters, 10, 2342-2348(2010). http://europepmc.org/abstract/MED/20560590

[7] Hao J, Zhou L, Qiu M. Nearly total absorption of light and heat generation by plasmonic metamaterials[J]. Physical Review B, 83, 165107(2011). http://adsabs.harvard.edu/abs/2011PhRvB..83p5107H

[8] Wang B X, Zhai X, Wang G Z et al. A novel dual-band terahertz metamaterial absorber for a sensor application[J]. Journal of Applied Physics, 117, 014504(2015). http://scitation.aip.org/content/aip/journal/jap/117/1/10.1063/1.4905261

[9] Gu C, Qu S B, Pei Z B et al. Multiband terahertz metamaterial absorber[J]. Chinese Physics B, 20, 017801(2011). http://kns.cnki.net/KCMS/detail/detail.aspx?filename=zgwl201101095&dbname=CJFD&dbcode=CJFQ

[10] Wang B X, Wang L L, Wang G Z et al. A simple design of ultra-broadband and polarization insensitive terahertz metamaterial absorber[J]. Applied Physics A, 115, 1187-1192(2014). http://link.springer.com/article/10.1007/s00339-013-8158-5

[11] Xu N, Chen J, Wang J et al. Dispersion HIE-FDTD method for simulating graphene-based absorber[J]. IET Microwaves, Antennas & Propagation, 11, 92-97(2017). http://ieeexplore.ieee.org/document/7828247/

[12] Zhang Y, Feng Y, Zhu B et al. Graphene based tunable metamaterial absorber and polarization modulation in terahertz frequency[J]. Optics Express, 22, 22743-22752(2014). http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-22-19-22743

[13] Chen C, Yang S Y, Yu J et al. Numerical study on tunable perfect absorption in square graphene-dielectric arrays at near-infrared wavelengths[J]. Materials & Design, 128, 157-165(2017).

[14] Parvaz R, Karami H. Far-infrared multi-resonant graphene-based metamaterial absorber[J]. Optics Communications, 396, 267-274(2017). http://www.sciencedirect.com/science/article/pii/S003040181730189X

[15] Fallahi A, Perruisseau-Carrier J. Design of tunable biperiodic graphene metasurfaces[J]. Physical Review B, 86, 195408(2012). http://journals.aps.org/prb/abstract/10.1103/PhysRevB.86.195408

[16] Huang X, Hu Z, Liu P. Graphene based tunable fractal Hilbert curve array broadband radar absorbing screen for radar cross section reduction[J]. AIP Advances, 4, 117103(2014).

[17] Balci O, Polat E O, Kakenov N et al. Graphene-enabled electrically switchable radar-absorbing surfaces[J]. Nature Communications, 6, 6628(2015). http://meetings.aps.org/Meeting/MAR15/Session/G15.15

[18] Yi D, Wei X C, Xu Y L. Tunable microwave absorber based on patterned graphene[J]. IEEE Transactions on Microwave Theory and Techniques, 65, 2819-2826(2017). http://ieeexplore.ieee.org/document/7886257/

[19] Ren L, Zhang Q, Yao J et al. Terahertz and infrared spectroscopy of gated large-area graphene[J]. Nano Letters, 12, 3711-3715(2012). http://pubs.acs.org/doi/abs/10.1021/nl301496r

[20] Zou T B, Hu F R, Xiao J et al. Design of a polarization-insensitive and broadband terahertz absorber using metamaterials[J]. Acta Physica Sinica, 63, 178103(2014).