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In order to improve the detection performance of 0.1–1THz terahertz wave, a new lithium tantalate pyroelectric terahertz detector based on ring hole array metamaterial is proposed. The quantitative influences of the characteristic parameters such as inner diameter, outer diameter, period and thickness on the transmission bandwidth and transmittance of ring hole array metamaterials are analyzed by simulation. The mechanisms of the influences of different combinations of ring hole array metamaterials and pyroelectric detectors on the detection bandwidth and detection rate of terahertz waves are clarified. The lithium tantalate pyroelectric terahertz detectors of the ring hole array metamaterial ware are fabricated by the MEMS technology. The transmission of the ring hole array metamaterial and the noise equivalent power of the metamaterial detector at different frequencies are tested. The results show that the transmittance of the fabricated ring hole array metamaterial is greater than 40% at 0.25–0.65 THz, and bandpass filtering is realized. When the ring hole array metamaterial and the pyroelectric detector maintain a sufficient distance, the noise equivalent power of the detector at 0.315 THz is 11.29 μW/Hz0.5, which is 6.3% of the 0.1 THz noise equivalent power (outside the bandpass band), so the bandpass detection is achieved. When the ring hole array metamaterial is attached to the detector, the noise equivalent power of the metamaterial detector at 0.315 THz is 4.64 μW/Hz0.5, which is 29.4% that of the detector without the ring hole array metamaterial, so the narrowband detection is achieved. The above conclusions show that the pyroelectric terahertz detector based on the ring hole array metamaterial can realize the bandpass and narrowband detection of specific frequency band in applications such as biological imaging and macromolecular detection.
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Google Scholar
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Google Scholar
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Google Scholar
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[17] Zi J C, Xu Q, Wang Q, Tian C X, Li Y F, Zhang X X, Han J G, Zhang W 2018 Appl. Phys. Lett. 113 101104
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图 1 圆环孔阵列超材料结构设计图 (a) 俯视图; (b) 左视图
Figure 1. Diagram of an Au ring hole array metamaterial structure: (a) Top view; (b) left view.
图 2 不同结合方式的圆环孔阵列超材料热释电太赫兹探测器原理图 (a) 带通超材料探测器; (b) 窄带超材料探测器
Figure 2. Schematic diagram of ring hole array metamaterial pyroelectric terahertz detectors with different combinations: (a) Bandpass metamaterial detector; (b) narrowband metamaterial detector.
图 3 圆环孔阵列超材料热释电太赫兹探测器的制备 (a)制备工艺流程图; (b) 带通超材料探测器; (c) 窄带超材料探测器
Figure 3. Fabrication of ring hole array metamaterial pyroelectric terahertz detector: (a) Fabrication process flow chart; (b) bandpass metamaterial detector; (c) narrowband metamaterial detector.
图 4 实验测试示意图 (a) 太赫兹时域光谱仪Advantest TAS7500TS实验测量示意图; (b) 频域反射式测试光路示意图
Figure 4. Schematic diagram of test: (a) Experimental measurement of terahertz time-domain spectrometer Advantest TAS7500 TS; (b) frequency domain reflectometry test system.
图 5 不同特征参数下圆环孔阵列超材料HFSS仿真透射曲线 (a) 内径r; (b) 外径R; (c) 周期P; (d) 基底厚度T
Figure 5. HFSS simulation transmission curve of ring hole array metamaterials under different characteristic parameters: (a) Inner diameter; (b) outer diameter; (c) period; (d) the thickness of the substrate.
图 6 圆环孔阵列超材料的性能与表征 (a) 0.1—1.3 THz波段HFSS仿真与时域光谱实验的透射率曲线; (b) 圆环孔阵列超材料光学显微图
Figure 6. Test properties of the ring hole array metamaterial: (a) 0.1–1.3 THz transmission curve; (b) optical micrograph of the ring hole array metamaterial.
图 7 窄带超材料探测器和碳纳米管吸收特性 (a) 窄带超材料探测器与碳纳米管吸收层的吸收率曲线; (b) 窄带太赫兹吸收器原理图; (c) 125—250 μm石英厚度下的窄带太赫兹吸收器吸收特性; (d) 吸收峰频率随石英厚度的变化规律
Figure 7. Narrowband terahertz detector and carbon nanotube absorption properties: (a) Absorption curve of narrowband terahertz detector and carbon nanotube absorber; (b) schematic of the Narrowband terahertz absorber; (c) absorption characteristics of narrowband metamaterial absorber at 125–250 μm quartz thickness; (d) variation of absorption peak frequency with quartz thickness.
表 1 热释电太赫兹探测器和带通超材料探测器在0.1 THz和0.315 THz频率下性能对比
Table 1. Performance comparison of the pyroelectric terahertz detector and the bandpass metamaterial detector at frequencies of 0.1 THz and 0.315 THz.
探测器类型 0.315 THz 0.1 THz VN/μV VR/μV NEP/(μW·Hz–0.5) VN/μV VR/μV NEP/(μW·Hz–0.5) 热释电太赫兹探测器 2.96 220.0 15.80 3.03 220.0 16.17 带通超材料探测器 1.06 110.3 11.29 0.95 6.2 179.94 
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表 2 热释电太赫兹探测器和窄带超材料探测器在0.1 THz和0.315 THz频率下性能对比
Table 2. Performance comparison of the pyroelectric terahertz detector and the narrowband metamaterial detector at frequencies of 0.1 THz and 0.315 THz.
探测器类型 0.315 THz 0.1 THz VN/μV VR/μV NEP/(μW·Hz–0.5) VN/μV VR/μV NEP/(μW·Hz–0.5) 热释电
太赫兹探测器2.96 220.0 15.80 3.03 220.0 16.17 窄带
超材料探测器1.03 260.6 4.64 1.02 48.5 24.70
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[1] Lewis R 2019 J. Phys. D Appl. Phys. 52 433001
Google Scholar
[2] Liang Z Q, Liu Z J, Wang T, Jiang Y D, Zheng X, Huang Z H, Wu X F 2015 40th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Hongkong, China, Auguest 23–28, 2015 p1
[3] Ding S H, Qi L, Li Y D, Wang Q 2011 Opt. Lett. 36 1993
Google Scholar
[4] Grant J, Escorcia-Carranza I, Li C, McCrindle I J, Gough J, Cumming D R 2013 Laser Photonics Rev. 7 1043
Google Scholar
[5] Kolenov I, Nesterov P, Nesterov I, Lukash A, Bezborodov V, Mizrakhy S 2020 IEEE Ukrainian Microwave Week (UkrMW) Kharkiv, Ukraine, September 21–25, 2020 p866
[6] Liu W, Zhao P G, Wu C S, Liu C H, Yang J B, Zheng L 2019 Food Chem. 293 213
Google Scholar
[7] Yu H T, Anthony J F, Vincent P W 2020 Sensors 20 712
Google Scholar
[8] Zhang K S, Luo W B, Huang S T, Bai X Y, Shuai Y, Zhao Y, Zeng X Q, Wu C G, Zhao Y, Zeng X Q, Wu C Q, Zhang W 2020 Sensor. Actuat. A Phys. 313 112186
Google Scholar
[9] Zhang Z W, Hu S Q, Nakayama T, Chen J, Li B W 2018 Carbon 139 289
Google Scholar
[10] Zhang Z W, Hu S Q, Xi Q, Nakayama T, Volz S, Chen J, Li B W 2020 Phys. Rev. B 101 081402
Google Scholar
[11] Müller R, Gutschwager B, Hollandt J, Kehrt M, Monte C, Müller R, Steiger A 2015 J. Infrared Millim. Te. 36 654
Google Scholar
[12] Deng T, Zhang Z H, Liu Y X, Wang Y G, Su F, Li S S, Zhang Y, Li H, Chen H J, Zhao Z R, Li Y, Liu Z W 2019 Nano Lett. 19 1494
Google Scholar
[13] 陈俊, 杨茂生, 李亚迪, 程登科, 郭耿亮, 蒋林, 张海婷, 宋效先, 叶云霞, 任云鹏, 任旭东, 张雅婷, 姚建铨 2019 68 47802
Google Scholar
Chen J, Yang M S, Li Y D, Cheng D K, Guo G L, Jiang L, Zhang H T, Song X X, Ye Y X, Ren Y P, Ren X D, Zhang Y T, Yao J Q 2019 Acta Phys. Sin. 68 47802
Google Scholar
[14] Devi K M, Sarma A K, Chowdhury D R, Kumar G 2017 Opt. Express 25 10484
Google Scholar
[15] Lv T T, Dong G H, Qin C H, Qu J, Lv B, Li W J, Zhu Z, Li Y X, Guan C Y, Shi J H 2021 Opt. Express 29 5437
Google Scholar
[16] Hoof N, Huurne S, Vervuurt R, Bol A A, Rivas J G 2019 APL Photonics 4 036104
Google Scholar
[17] Zi J C, Xu Q, Wang Q, Tian C X, Li Y F, Zhang X X, Han J G, Zhang W 2018 Appl. Phys. Lett. 113 101104
Google Scholar
[18] Kuznetsov S A, Paulish A G, Navarro-Cía M, Arzhannikov A V 2016 Sci. Rep. 6 21079
Google Scholar
[19] Liu Z J, Liang Z Q, Zheng X, Jiang Y D 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Maison de la Chimie, France, September 1–6, 2019 p1
[20] Zhang K S, Luo W B, Zeng X H, Huang S T, Xie Q, Wan L M, Shuai Y, Wu C H, Zhang W L 2022 IEEE Sensor. J. 22 10381
Google Scholar
[21] Suen J Y, Fan K, Montoya J, Bingham C, Padilla W J 2017 Optica 4 276
Google Scholar
[22] Tan X C, Li J Y, Yang A, Liu H, Yi F 2018 Conference on Lasers and Electro-Optics (CLEO) San Jose Convention Center, United States, May, 13–18, 2018 p4
[23] Ranacher C, Consani C, Tortschanoff A, Rauter L, Jakoby B 2019 Sensors 19 2513
Google Scholar
[24] Ebrahim S, Elshaer A, Soliman M, Tayl M 2016 Sensor. Actuat. A Phys. 238 389
Google Scholar
[25] Han F Y, Liu P K 2020 Adv. Opt. Mater. 8 1901331
Google Scholar
[26] Wang B X, Wang G Z, Wang L L, Zhai X 2016 IEEE Photonic. Tech. Lett. 28 307
Google Scholar
[27] Guo W L, Dong Z, Xu Y J, Liu C L, Wei D C, Zhang L B, Shi X Y, Guo C, Xu H, Chen G, Wang L, Zhang K, Chen X S, Lu W 2020 Adv. Sci. 7 1902699
Google Scholar
[28] Rodrigo S G, Martín-Moreno L 2016 Opt. Lett. 41 293
Google Scholar
[29] Xia S, Yang D X, Li T, Liu X, Wang J 2014 Opt. Lett. 39 1270
Google Scholar
[30] Wu Z R, Wang L, Peng Y T, Young A, Seraphin S, Hao X 2008 J. Appl. Phys. 103 56
[31] Wang Y, Cui Z J, Zhu D Y, Zhang X B, Qian L 2018 Opt. Express 26 15343
Google Scholar
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