Terahertz Perfect Absorber Based on Asymmetric Open-Loop Cross-Dipole Structure
Meng-Yao Yan , Bi-Jun Xu** , Zhi-Chao Sun , Zhen-Dong Wu , Bai-Rui Wu
School of Sciences, Zhejiang University of Science and Technology, Hangzhou 310023, China
Abstract ：Equipped with multiple and unique features, a terahertz absorber exhibits great potential for use in the development of communication, military, and other fields where achieving perfect broadband absorption has always been a challenge. We present a metamaterial terahertz (THz) absorber comprising a cross-dipole patch, four symmetric square patches and an asymmetric open-loop patch with a good perfect absorption rate for TE and TM polarizations. The average absorption of more than 96% occurs in the frequency range from 2.4 THz to 3.8 THz, in which the absorptance peak can reach 99.9%, as indicated by simulated results. Our design has broad potential applications in THz couplers, as well as in fields like biology and security.
收稿日期: 2020-02-24
出版日期: 2020-05-26
PACS:
78.67.Pt
(Multilayers; superlattices; photonic structures; metamaterials)
42.25.Bs
(Wave propagation, transmission and absorption)
42.70.-a
(Optical materials)
78.20.Ci
(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
[1] Koenig S, Lopez-Diaz D, Antes J et al 2013 Nat. Photon. 7 977 [2] Kurt H, Citrin D 2005 Appl. Phys. Lett. 87 041108 [3] Watts C M, Liu X, Padilla W J 2012 Adv. Mater. 24 OP181 [4] Fan S, Li T, Zhou J et al 2017 AIP Adv. 7 115202 [5] Tao H, Landy N I, Bingham C M et al 2008 Opt. Express 16 7181 [6] Chen H T 2012 Opt. Express 20 7165 [7] Smith D R, Padilla W J, Vier D et al 2000 Phys. Rev. Lett. 84 4184 [8] Zhang B, Lv L, He T et al 2015 Appl. Phys. Lett. 107 093301 [9] Kapoor A, Singh G 2000 J. Lightwave Technol. 18 849 [10] Feng L, Xu Y L, Fegadolli W S et al 2013 Nat. Mater. 12 108 [11] Grady N K, Heyes J E, Chowdhury D R et al 2013 Science 340 1304 [12] Yachmenev A, Lavrukhin D, Glinskiy I et al 2019 Opt. Eng. 59 061608 [13] Li W, Coppens Z J, Besteiro L V et al 2015 Nat. Commun. 6 8379 [14] Cong L, Pitchappa P, Lee C et al 2017 Adv. Mater. 29 1700733 [15] Duan G, Schalch J, Zhao X et al 2018 Opt. Express 26 2242 [16] Landy N I, Sajuyigbe S, Mock J J et al 2008 Phys. Rev. Lett. 100 207402 [17] Liu N, Mesch M, Weiss T et al 2010 Nano Lett. 10 2342 [18] Wang M, Huang S Y, Hu R et al 2019 Chin. Phys. B 28 087804 [19] Low T, Avouris P 2014 ACS Nano 8 1086 [20] Tang X P, Yang Z Q, Shi Z J, Lan F 2016 Chin. Phys. Lett. 33 088401 [21] Wang B X, Wang G Z 2018 Plasmonics 13 123 [22] Islam M R, Kabir M F, Talha K M A et al 2020 Opt. Eng. 59 016113 [23] Paulish A, Gusachenko A, Morozov A et al 2019 Opt. Eng. 59 061612 [24] Fan C Z, Tian Y C, Ren P W et al 2019 Chin. Phys. B 28 076105 [25] Liu M, Yang Q, Rifat A A et al 2019 Adv. Opt. Mater. 7 1900736 [26] Duan G, Schalch J, Zhao X et al 2019 Sens. Actuators A 287 21 [27] Daraei O M, Goudarzi K, Bemani M 2020 Opt. Laser Technol. 122 105853 [28] Zhang H, Ling F, Wang H et al 2020 Opt. Commun. 463 125394 [29] Zhong Q, Wang T, Jiang X et al 2020 Opt. Commun. 458 124637 [30] Yan M Y, Sun Z C, Wu B R et al 2020 Front. Phys. 8 46 [31] Yang P, Qin J, Schalch J, Xu J, Han T C et al 2019 Acta Phys. Sin. 68 087802 (in Chinese) [32] Soheilifar, M R 2019 Optik 182 702 [33] Hao S B, Zhang L Z, Ma Y Y, Chen M Y et al 2019 Chin. Phys. Lett. 36 124205 [34] Wang D T, Wang X C, Zhang X, Yuan H R et al 2020 Chin. Phys. Lett. 37 045201 [35] Li S H, Li J S 2019 Chin. Phys. B 28 094210 [36] Xie Y M, Liu C Y, Ding Z J et al 2016 Chin. Phys. Lett. 33 094208 [37] Zhao J, Zhang J, Qin C et al 2016 Chin. Phys. Lett. 33 027801 [38] Wang C F, Li Q S, Wang J S et al 2016 Chin. Phys. Lett. 33 076802 [39] Wang L, Song W, Hu W, Li G, Luo X et al 2019 Chin. Phys. B 28 018503 [40] Meng X Q, Chen S L, Fang Y Z, Kou J L 2019 Chin. Phys. B 28 078101 [41] Wang W M, Zhang L L, Li Y T, Sheng Z M, Zhang J 2018 Acta Phys. Sin. 67 124202 (in Chinese) [42] Liu C, Ooi Y K, Islam S, Xing H, Jena D and Zhang J 2018 Appl. Phys. Lett. 112 011101 [43] Lu X H, Jing C B, Wang L W et al 2019 Chin. Phys. Lett. 36 098501 [44] Cheng X T and Liang X G 2017 Chin. Phys. B 26 120505 [45] Xia G, Kou W, Yang L and Du Y C 2017 Chin. Phys. B 26 104403 [46] Jiang S L, Li X F, Su R F, Jia X Q et al 2017 Chin. Phys. Lett. 34 090701
[1]
.
[2]
.
[3]
.
[4]
.
[5]
.
[6]
.
[7]
.
[8]
.
[9]
.
[10]
.
[11]
.
[12]
.
[13]
.
[14]
.
[15]
.
2020, Vol. 37 
