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In this paper, we present an ultra-broadband polarization-independent terahertz (THz) metamaterial absorber (MA) made of circular truncated cone metamaterial. Absorptivity higher than 92.3% at normal incidence is obtained in a wide range of frequencies from 2 to 10 THz. We employ an isotropic metamaterial cell which consists of alternating layers of Au metal and SiO2 dielectric spacer. The absorption spectra of the THz MA are calculated using the finite-difference time domain (FDTD) method within the CST Microwave Studio 2009 in the frequency range of 0–10 THz. Our broadband absorber can be regarded as a group of micro-absorbers perpendicularly stacked and their absorption peaks coupling to each other to form an ultra broadband absorption. This THz MA has the advantages of broadband, polarization-independent and fabrication facility, and thus can be widely applied in THz wave harvesting, detection, spectrum imaging and stealthy technology.
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Keywords:
- terahertz wave /
- metamaterials absorber /
- circular truncated cone /
- ultra-broadband
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[2] Landy N I, Sajuyigbe S, Mock J J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[3] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[4] Tao H, Padilla W J, Zhang X, Averitt R D 2011 IEEE J. Sel. Top. Quantum Electron. 17 92
[5] Tao H, Landy N I, Bingham C M, Zhang X, Averitt R D, Padilla W J 2008 Opt. Express 16 7181
[6] Avitzour Y, Urzhumov Y A, Shvetset G 2009 Phys. Rev. 79 045131
[7] Landy N I, Sajuyigbe S, Mock J J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[8] Tao H, Bingham C M, Strikwerda A C, Pilon D, Shrekenhamer D, Landy N I, Fan K, Zhang X, Padilla W J, Averitt R D 2008 Phys. Rev. B 78 241103
[9] Diem M, Koschny T, Soukoulis C M 2009 Phys. Rev. B 79 33101
[10] Liu X L, Starr T, Starr A F, Padilla W J 2010 Phys. Rev. Lett. 104 207403
[11] Liu N, Mesch M, Weiss T, Hentschel M, Giessen H 2010 Nano Lett. 10 2342
[12] Noor A, Hu Z 2010 Iet. Microw. Antenna P 4 667
[13] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[14] Lu L, Qu S B, Ma H, Yu F, Xia S, Xu Z, Bai P 2013 Acta Phys. Sin. 62 104102 (in Chinese) [鲁磊, 屈绍波, 马华, 余斐, 夏颂, 徐卓, 柏鹏 2013 62 104102]
[15] Lu L, Qu S B, Xia S, Xu Z, Ma H, Wang J F, Yu F 2013 Acta Phys. Sin. 62 013701 (in Chinese) [鲁磊, 屈绍波, 夏颂, 徐卓, 马华, 王甲富, 余斐 2013 62 013701]
[16] Grant J, Ma Y, Saha S, Lok L B, Khalid A, Cumming D R S 2011 Opt. Lett. 36 1524
[17] Wang B, Koschny T, Soukoulis C M 2009 Phys. Rev. B 80 033108
[18] Brown J R, Hibbins A P, Lockyear M J, Lawrence C R, Sambles J R 2008 J. Appl. Phys. 104 043105
[19] Wen Q Y, Zhang H W, Xie Y S, Yang Q H, Liu Y L 2009 Appl. Phys. Lett. 95 241111
[20] Gu C, Qu S B, Pei Z B, Xu Z, Liu J, Gu W 2011 Chin. Phys. B 20 017801
[21] Shen X P, Cui T J, Ye J X 2012 Acta Phys. Sin. 61 058101 (in Chinese) [沈晓鹏, 崔铁军, 叶建祥 2012 61 058101]
[22] Chen Z, Zhang Y X 2013 Chin. Phys. B 22 067802
[23] Huang L, Chen H 2011 Progress In Electromagnetics Research 113 103
[24] Peng X Y, Wang B, Lai S M, Zhang D H, Teng J H 2012 Opt. Express 20 27756
[25] Huang L, Chowdhury D R, Ramani S, Reiten M T, Luo S N, Taylor A J, Chen H T 2012 Opt. Lett. 37 154
[26] Ye Y Q, Jin Y, He S L 2010 Journal of the Optical Society of America B 27 498
[27] Grant J, Ma Y, Saha S, Khalid A, Cumming D R S 2011 Opt. Lett. 36 3476
[28] Cui Y, Fung K H, Xu J, Ma H, Jin Y, He S, Fang N X 2012 Nano Lett. 12 1443
[29] Padilla W J, Taylor A J, Highstrete C, Lee M, Averitt R D 2006 Phys. Rev. Lett. 96 107401
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[1] Caloz C, Itoh T 2006 Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications: The Engineering Approach (New Jersey: John Wiley & Sons, Inc.) pp2,3
[2] Landy N I, Sajuyigbe S, Mock J J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[3] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[4] Tao H, Padilla W J, Zhang X, Averitt R D 2011 IEEE J. Sel. Top. Quantum Electron. 17 92
[5] Tao H, Landy N I, Bingham C M, Zhang X, Averitt R D, Padilla W J 2008 Opt. Express 16 7181
[6] Avitzour Y, Urzhumov Y A, Shvetset G 2009 Phys. Rev. 79 045131
[7] Landy N I, Sajuyigbe S, Mock J J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[8] Tao H, Bingham C M, Strikwerda A C, Pilon D, Shrekenhamer D, Landy N I, Fan K, Zhang X, Padilla W J, Averitt R D 2008 Phys. Rev. B 78 241103
[9] Diem M, Koschny T, Soukoulis C M 2009 Phys. Rev. B 79 33101
[10] Liu X L, Starr T, Starr A F, Padilla W J 2010 Phys. Rev. Lett. 104 207403
[11] Liu N, Mesch M, Weiss T, Hentschel M, Giessen H 2010 Nano Lett. 10 2342
[12] Noor A, Hu Z 2010 Iet. Microw. Antenna P 4 667
[13] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[14] Lu L, Qu S B, Ma H, Yu F, Xia S, Xu Z, Bai P 2013 Acta Phys. Sin. 62 104102 (in Chinese) [鲁磊, 屈绍波, 马华, 余斐, 夏颂, 徐卓, 柏鹏 2013 62 104102]
[15] Lu L, Qu S B, Xia S, Xu Z, Ma H, Wang J F, Yu F 2013 Acta Phys. Sin. 62 013701 (in Chinese) [鲁磊, 屈绍波, 夏颂, 徐卓, 马华, 王甲富, 余斐 2013 62 013701]
[16] Grant J, Ma Y, Saha S, Lok L B, Khalid A, Cumming D R S 2011 Opt. Lett. 36 1524
[17] Wang B, Koschny T, Soukoulis C M 2009 Phys. Rev. B 80 033108
[18] Brown J R, Hibbins A P, Lockyear M J, Lawrence C R, Sambles J R 2008 J. Appl. Phys. 104 043105
[19] Wen Q Y, Zhang H W, Xie Y S, Yang Q H, Liu Y L 2009 Appl. Phys. Lett. 95 241111
[20] Gu C, Qu S B, Pei Z B, Xu Z, Liu J, Gu W 2011 Chin. Phys. B 20 017801
[21] Shen X P, Cui T J, Ye J X 2012 Acta Phys. Sin. 61 058101 (in Chinese) [沈晓鹏, 崔铁军, 叶建祥 2012 61 058101]
[22] Chen Z, Zhang Y X 2013 Chin. Phys. B 22 067802
[23] Huang L, Chen H 2011 Progress In Electromagnetics Research 113 103
[24] Peng X Y, Wang B, Lai S M, Zhang D H, Teng J H 2012 Opt. Express 20 27756
[25] Huang L, Chowdhury D R, Ramani S, Reiten M T, Luo S N, Taylor A J, Chen H T 2012 Opt. Lett. 37 154
[26] Ye Y Q, Jin Y, He S L 2010 Journal of the Optical Society of America B 27 498
[27] Grant J, Ma Y, Saha S, Khalid A, Cumming D R S 2011 Opt. Lett. 36 3476
[28] Cui Y, Fung K H, Xu J, Ma H, Jin Y, He S, Fang N X 2012 Nano Lett. 12 1443
[29] Padilla W J, Taylor A J, Highstrete C, Lee M, Averitt R D 2006 Phys. Rev. Lett. 96 107401
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