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The terahertz metamaterial absorber sensor is an important functional device of the metamaterials. It can realize not only the perfect absorption in the incident terahertz wave, but also the detect sample by monitoring the deviation of the absorption frequency of the metamaterial absorber sensor. Dual-band metamaterial absorber sensor has double frequency resonance peak. By matching the characteristic frequency between the sensor and the substance to be measured, the information reflecting the difference of the substance to be measured is increased, to improve the accuracy and sensitivity of material detection. Compared with the traditional metamaterial absorber sensor, the dual-band metamaterial absorber sensor can realize very accurate sensing and detection function through multi-point matching of information. In this paper, a double band terahertz band metamaterial absorber sensor is proposed. The absorption rate of the metamaterial absorber sensor reaches over 99% at 0.387 THz and 0.694 THz frequency point, achieving “perfect absorption”. Through the analysis of a series of materials with different refractive indices to be measured, the suitable sensing range of the designed terahertz metamaterial absorber sensor is obtained. By analyzing the different thickness of the substance to be measured and the different medium layer materials, the thickness of the substance to be measured and the medium layer materials which can improve the sensing performance of the sensor are obtained. In this paper, the sensing identification of edible oil is taken for example to verify that the dual-band terahertz metamaterial absorber sensor designed in this paper can realize high sensitivity and rapid detection, and has a broad development prospect in the field of sensing and detection. -
Keywords:
- terahertz /
- dual-band Frequency /
- metamaterial absorber /
- sensor
[1] 李允植 2012 太赫兹科学与技术原理 (北京: 国防工业出版社) 第1−30页
Lee Y K 2012 Principles of Terahertz Science and Technology (Beijing: National Defense Industry Press) pp1−30 (in Chinese)
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图 1 双频带太赫兹超材料吸波体传感器结构示意图
Figure 1. Schematic diagram of dual-band THz MM absorber sensor structure.
图 2 双频带太赫兹超材料吸波体传感器吸收与反射特性仿真曲线
Figure 2. Simulated absorption and reflection characteristic curve of dual-band THz MM absorber sensor.
图 3 (a) 谐振频率
${f_1}$ 处表面电场分布; (b) 谐振频率${f_2}$ 处表面电场分布Figure 3. (a) Surface electric field distribution at the
${f_1}$ resonance frequency; (b) surface electric field distribution at the${f_2}$ resonance frequency.
图 4 (a) 谐振频率
${f_1}$ 处表面电流分布; (b) 谐振频率${f_2}$ 处表面电流分布Figure 4. (a) Surface current distribution at the
${f_1}$ resonance frequency; (b) surface current distribution at the${f_2}$ resonance frequency.
图 5 (a) 谐振频率
${f_1}$ 处底面电流分布; (b) 谐振频率${f_2}$ 处底面电流分布Figure 5. (a) Undersurface current distribution at the
${f_1}$ resonance frequency; (b) undersurface current distribution at the${f_2}$ resonance frequency.
图 6 (a) 谐振频率
${f_1}$ 处磁场分布; (b) 谐振频率${f_2}$ 处磁场分布Figure 6. (a) Magnetic field distribution at the
${f_1}$ resonance frequency; (b) magnetic field distribution at the${f_2}$ resonance frequency.
图 7 折射率从
$n$ = 1变化到$n$ = 2时双频带太赫兹超材料吸波体的吸收特性仿真曲线Figure 7. Simulated absorption characteristic curve of dual-band THz MM absorber with refractive index changes from
$n$ = 1 to$n$ = 2.
图 8 待测分析物折射率从
$n$ = 1变化到$n$ = 2时传感器的谐振频率偏移及其线性拟合Figure 8. Resonance frequency shift of the sensor and linear fitting with determined refractive index changes from
$n$ = 1 to$n$ = 2.
图 9 (a) 待测分析物折射率从
$n$ = 1变化到$n$ = 2时谐振频率${f_1}$ 偏移量及其线性拟合; (b) 待测分析物折射率从$n$ = 1变化到$n$ = 2时谐振频率${f_2}$ 偏移量及其线性拟合Figure 9. (a) Resonance frequency shifts of
${f_1}$ resonance frequency with refractive index changes from$n$ = 1 to$n$ = 2 and linear fitting; (b) resonance frequency shifts of${f_2}$ resonance frequency with refractive index changes from$n$ = 1 to$n$ = 2 and linear fitting.
图 10 待测分析物厚度对传感器折射率频率灵敏度的影响
Figure 10. Influence of the thickness of the analyte to be measured on the refractive index frequency sensitivity of the sensor.
图 11 (a) 不同中间介质层材料对传感器谐振频率
${f_1}$ 处偏移量的影响及其线性拟合; (b) 不同中间介质层材料对传感器谐振频率${f_2}$ 处偏移量的影响及其线性拟合Figure 11. (a) Influence of different dielectric layer materials on the resonance frequency
${f_1}$ shift of sensor and linear fitting; (b) influence of different dielectric layer materials on the resonance frequency${f_2}$ shift of sensor and linear fitting.
图 12 (a) 传感器检测食用油的谐振频点
${f_1}$ ; (b) 传感器检测食用油的谐振频点${f_2}$ Figure 12. (a) Sensor resonance frequency
${f_1}$ of detects edible oil; (b) sensor resonance frequency${f_2}$ of detects edible oil. -
[1] 李允植 2012 太赫兹科学与技术原理 (北京: 国防工业出版社) 第1−30页
Lee Y K 2012 Principles of Terahertz Science and Technology (Beijing: National Defense Industry Press) pp1−30 (in Chinese)
[2] Sun S, He Q, Hao J, Xiao S, Zhou L 2019 Adv. Opt. Photonics 11 380
Google Scholar
[3] Su Z, Yin J, Zhao X 2015 Opt. Express 23 1679
Google Scholar
[4] 张玉萍, 李彤彤, 吕欢欢 2015 64 117801
Google Scholar
Zhang Y P, Li T T, Lv H H 2015 Acta Phys. Sin. 64 117801
Google Scholar
[5] 闫昕, 张兴坊, 梁兰菊, 姚建铨 2014 光谱学与光谱分析 09 2365
Google Scholar
Yan X, Zhang X F, Liang L J, Yao J Q 2014 Spectrosc. Spect. Anal. 09 2365
Google Scholar
[6] 高劲松, 王珊珊, 冯晓国, 徐念喜, 赵晶丽, 陈红 2010 59 7338
Google Scholar
Gao J S, Wang S S, Feng X G, Xu N X, Zhao J L, Chen H 2010 Acta Phys. Sin. 59 7338
Google Scholar
[7] 王秀芝, 高劲松, 徐念喜 2013 62 237302
Google Scholar
Wang X Z, Gao J S, Xu N X 2013 Acta Phys. Sin. 62 237302
Google Scholar
[8] Li S Y, Ai X C, Wu R H 2018 Opt. Commun. 428 251
Google Scholar
[9] Kern D J, Werner D H 2003 Microwave Opt. Technol. Lett. 38 61
Google Scholar
[10] Moritake Y, Tanaka T 2018 Opt. Express 26 3674
Google Scholar
[11] Hu T, Strikwerda A C, Liu M 2010 Appl. Phys. Lett. 97 261909
Google Scholar
[12] Li M, Li S, Yu Y F, Ni X, Chen R S 2018 Opt. Express 26 24702
Google Scholar
[13] Xu W, Sonkusale S 2013 Appl. Phys. Lett. 103 031902
Google Scholar
[14] 丰茂昌, 李勇峰, 张介秋, 王甲富, 王超, 马华, 屈绍波 2018 67 198101
Google Scholar
Feng M C, Li Y F, Zhang J Q, Wang J F, Wang C, Ma H, Qu S B 2018 Acta Phys. Sin. 67 198101
Google Scholar
[15] Cai T, Tang S, Wang G, Xu H, Sun S, He Q, Zhou L 2017 Adv. Opt. Mater. 5 1600506
Google Scholar
[16] Rahimabady M, Statharas E C, Yao K, Mirshekarloo M S, Chen S, Tay F E H 2017 Appl. Phys. Lett. 111 241601
Google Scholar
[17] Brian B, Sepúlveda B, Alaverdyan Y, Lechuga L M, Käll M 2009 Opt. Express 17 2015
Google Scholar
[18] Wang W, Yan F P, Tan S Y 2020 Photonics Res. 8 519
Google Scholar
[19] Meng K, Park S J, Burnett A D 2019 Opt. Express 27 23164
Google Scholar
[20] Xiong H, Hong J S, Jin D L 2013 Chin. Phys. B 22 014101
Google Scholar
[21] Wang X Z, Gao J S, Xu N X, Liu H 2014 Chin. Phys. B 23 047303
Google Scholar
[22] He X Y, Liu F, Lin F T, and Shi W Z 2021 Opt. Lett. 46 472
Google Scholar
[23] He X Y, Lin F T, Liu F, Shi W Z 2020 J. Phys. D: Appl. Phys. 53 155105
Google Scholar
[24] Peng J, He X Y, Shi C Y Y, Leng J, Lin F T, Liu F, Zhang H, Shi W Z 2020 Phys. E 124 114309
Google Scholar
[25] Hu T, Chieffo Logan R, Brenckle Mark A 2011 Adv. Mater. 23 3197
Google Scholar
[26] Whitesides G M 2006 Nature 442 368
Google Scholar
[27] Zhou H, Hu D L, Yang C 2018 Sci. Rep. 8 14801
Google Scholar
[28] Hu X, Xu G Q, Wen L 2016 Laser Photonics Rev. 10 962
Google Scholar
[29] Janneh M, De Marcellis A, Palange E 2018 Opt. Commun. 416 152
Google Scholar
[30] Wang B X, Zhai X, Wang G Z 2015 Appl. Phys. Lett. 117 014504
Google Scholar
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