1 School of Science, Lanzhou University of Technology, Lanzhou 730050, China 2 College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
We propose a two-dimensional metal grating with rhombus particles on a gold film structure for refractive index sensing due to its perfect absorption at near-infrared wavelength. Via two-dimensional metal grating coupling, the incident light energy is effectively transformed into the surface plasmons which propagate along the upper surface of the gold film and interact with the surrounding environment in a wide range. The plasmonic resonance mechanism of the structure is discussed in detail by theoretical analysis and finite-difference time-domain method. After optimizing the geometrical parameters, the designed structure shows the sensing performance with a refractive index sensitivity of 1006 nm/RIU. More importantly, this plasmonic refractive index sensor achieves an ultra wide refractive index sensing range from 1.0 to 2.4 with a stable sensing performance. The promising simulation results of the structure show that the sensor has a broad application prospect in the field of biology and chemistry.
Received: 11 June 2020
Revised: 29 June 2020
Accepted manuscript online: 25 August 2020
Fund: the National Natural Science Foundation of China (Grant Nos. 61865008 and 61505074) and the HongLiu First-Class Disciplines Development Program of Lanzhou University of Technology.
Jiankai Zhu(朱剑凯), Xiangxian Wang(王向贤), Xiaoxiong Wu(吴枭雄), Yingwen Su(苏盈文), Yueqi Xu(徐月奇), Yunping Qi(祁云平), Liping Zhang(张丽萍), and Hua Yang(杨华)$ Ultra wide sensing range plasmonic refractive index sensor based on nano-array with rhombus particles 2020 Chin. Phys. B 29 114204
Fig. 1.
Schematic view of the proposed plasmonic structure. From top to bottom, the components consist of 2D gold periodic arrays, gold film, and glass substrate. The black and blue arrows represent the propagation direction and polarization direction of the incident light, respectively. Inside the dotted circle shows the enlarged view of the rhombus particles.
Fig. 2.
The absorption spectrum of the structure in the near-infrared range, where w = 380 nm, h1 = 80 nm, and the period is 1000 nm.
Fig. 3.
Electric field distribution at the resonance wavelength of (a) mode 1 and (b) mode 2 in the X–Z plane along the center of the gold rhombus particles. Electric field distribution at the resonance wavelength of (c) mode 1 and (d) mode 2 on the upper surface of the gold film.
Fig. 4.
(a) Absorption spectra of the structure with different 2D grating periods when w and h1 are 380 nm and 80 nm, respectively. (b) Comparison between simulation results and theoretical analysis about the resonance wavelengths of mode 2 for different 2D grating periods.
Fig. 5.
(a) The absorption spectra of the structure when the period and w are 1000 nm and 380 nm, respectively, where h1 varies from 80 nm to 140 nm in step of 20 nm. (b) The absorption spectra of the structure when the period and h1 are 1000 nm and 80 nm, respectively, where w varies from 200 nm to 500 nm in step of 60 nm.
Fig. 6.
(a) The absorption spectra of the structure with optimized geometrical parameters for different analyte RI. (b) Resonance wavelength and peak strength versus the RI of analyte.
Fig. 7.
(a) The absorption spectra of the structure when the analyte RI varies from 1.0 to 2.4 in step interval of 0.2. (b) The FOM and FWHM of mode 2 in the ultra wide analyte RI range.
[1]
Liu G, Liu X, Chen J, Li Y, Shi L, Fu G, Liu Z 2019 Sol. Energy Mater. Sol. Cells190 20 DOI: 10.1016/j.solmat.2018.10.011
[2]
Li J, Chen X, Yi Z, Yang H, Tang Y, Yi Y, Yao W, Wang J, Yi Y 2020 Mater. Today Energy16 100390 DOI: 10.1016/j.mtener.2020.100390
Wang X, Wu Y, Wen X, Zhu J, Bai X, Qi Y, Yang H 2020 Opt. Quantum Electron.52 238 DOI: 10.1007/s11082-020-02360-2
[32]
Wu Y, Wang X, Wen X, Zhu J, Bai X, Jia T, Yang H, Zhang L, Qi Y 2020 Phys. Lett. A384 126544 DOI: 10.1016/j.physleta.2020.126544
[33]
Wang X, Zhu J, Wu Y, Xu Y, Su Y, Zhang L, Qi Y, Wen X, Yang H 2020 Results Phys.17 103175 DOI: 10.1016/j.rinp.2020.103175
[34]
Chen J, Wang X, Tang F, Ye X, Yang L, Zhang Y 2020 Results Phys.16 102867 DOI: 10.1016/j.rinp.2019.102867
[35]
Liu C, Yang L, Liu Q, Wang F, Sun Z, Sun T, Mu H, Chu P K 2018 Plasmonics13 779 DOI: 10.1007/s11468-017-0572-7
[36]
Liu C, Wang J, Wang F, Su W, Yang L, Lv J, Fu G, Li X, Liu Q, Sun T, Chu P K 2020 Opt. Commun.464 125496 DOI: 10.1016/j.optcom.2020.125496
[37]
Liu C, Wang J, Jin X, Wang F, Yang L, Lv J, Fu G, Li X, Liu Q, Sun T, Chu P K 2020 Optik (Stuttg).207 164466 DOI: 10.1016/j.ijleo.2020.164466
[38]
Chen J, Yuan J, Zhang Q, Ge H, Tang C, Liu Y, Guo B 2018 Opt. Mater. Express8 342 DOI: 10.1364/OME.8.000342
[39]
Chen J, Zhang Q, Peng C, Tang C, Shen X, Deng L, Park G 2018 IEEE Photon. Technol. Lett.30 728 DOI: 10.1109/LPT.2018.2814216
[40]
Chen J, Fan W, Mao P, Tang C, Liu Y, Yu Y, Zhang L 2017 Plasmonics12 529 DOI: 10.1007/s11468-016-0294-2
[41]
Chen J, Nie H, Peng C, Qi S, Tang C, Zhang Y, Wang L, Park G S 2018 J. Light. Technol.36 3481 DOI: 10.1109/JLT.2018.2846019
[42]
Wang X, Zhu J, Tong H, Yang X, Wu X, Pang Z, Yang H, Qi Y 2019 Chin. Phys. B28 044201 DOI: 10.1088/1674-1056/28/4/044201
[43]
Guner H, Ozgur E, Kokturk G, Celik M, Esen E, Topal A E, Ayas S, Uludag Y, Elbuken C, Dana A 2017 Sens. Actuators B Chem.239 571 DOI: 10.1016/j.snb.2016.08.061
[44]
Sun P, Zhou C, Jia W, Wang J, Xiang C, Xie Y, Zhao D 2020 Opt. Commun.459 124946 DOI: 10.1016/j.optcom.2019.124946
[45]
Sui B, Xu Y, Wang Z, Zhang C, Qin L, Li X, Wu S 2019 Opt. Express27 38382 DOI: 10.1364/OE.27.038382
[46]
Wang X, Zhu J, Wen X, Wu X, Wu Y, Su Y, Tong H, Qi Y, Yang H 2019 Opt. Mater. Express9 3079 DOI: 10.1364/OME.9.003079
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.