Author Affiliations
1College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China2School of Science, Lanzhou University of Technology, Lanzhou 730050, Chinashow less
Fig. 1. The structure schematic of two slits MIM SPPs waveguides with a regular octagon ring resonator: (a) 3D model; (b) 2D model.
Fig. 2. (a) The real part of
as functions of wavelength and
d when
T = 20 ℃; (b) the real part of
as functions of wavelength and
T when
d = 50 nm.
Fig. 3. (a) Comparison of the simulation and the theoretical results of transmittance of the temperature sensor; (b) the magnetic field
of peak I at
; (c) the magnetic field
of peak II at
; (d) the magnetic field
of peak III at
; (e) the magnetic field
of peak IV at
; (f) the magnetic field
of peak V at
.
Fig. 4. The transmission spectra of the temperature sensor under different T: (a) Peak I, Peak II and Peak III in the wavelength range of 690 nm to 1100 nm; (b) peak IV and Peak V in the wavelength range of 1000 nm to 2500 nm.
Fig. 5. The relationship between the resonance wavelength and T of the five transmission peaks.
Fig. 6. The transmission spectra of the structure under different H: (a) In the wavelength range of 690 nm to 1100 nm; (b) in the wavelength range of 1000 nm to 2500 nm. (c) the transmission spectra of the structure under different L in the wavelength range of 1000 nm to 3000 nm; (d) the relationship between sensitivity of Peak V and Peak IV and parameter H; (e) the relationship between sensitivity of Peak V and Peak IV and parameter L.
Fig. 7. (a) The transmission spectra of the structure under different w; (b) when the temperature changes from 20 ℃ to –20 ℃, the displacement of Peak IV at w = 5 nm and w = 10 nm; (c) the transmission spectra of the structure with different wavelength and w; (d) when the temperature changes from 20 ℃ to –20 ℃, the displacement of Peak V at w = 5 nm and w = 10 nm.
Fig. 8. (a) When the system is used as a temperature sensor, the transmission spectra at T = 20 ℃ and T = –20 ℃; (b) when the system is used as a refractive index sensor, the transmission spectra at n = 1 and n = 1.01.
参考文献 | 温度传感器 | 折射率传感器 | 半峰全宽 | 共振峰数 | 工作波段/nm | FOM | S/nm·℃
| S/nm·RIU–1 | FWHM/nm | [20]
| 1.36 | 3460 | ≈200 | 3 | 500—2000 | ≈17.3 | [24]
| 0.65 | | 50.6 | 2 | 600—1700 | | [29]
| | 1500 | ≈80 | 3 | 600—2000 | ≈18.7 | [31]
| 0.51 | 1736 | 177.3 | 1 | 550—900 | 9.79 | This work | 0.9 | 2400 | 18 | 5 | 700—3200 | 133 |
|
Table 1. Performance comparison of various temperature sensors and refractive index sensors.