Hongxia Zhao, Peihong Cheng, Zhiqun Ding, Jingrui Wang, Jilong Bao. Refractive Index Sensor Based on Alternating Grating and Graphene Composite Structure[J]. Acta Optica Sinica, 2021, 41(7): 0728001
- Acta Optica Sinica
- Vol. 41, Issue 7, 0728001 (2021)
Fig. 1. Structural diagram of sensor
Fig. 2. Absorption spectrum of sensor
Fig. 3. Electric field and magnetic field distributions in z=0 plane. (a) Electric field and (c) magnetic field distributions at λ1=1.025 μm; (b) electric field distribution at λ2=1.083 μm; (d) magnetic field distribution at λ3=1.057 μm
Fig. 4. Spectral characteristics under different conditions. (a) With and without graphene; (b) different graphene thicknesses
Fig. 5. Variation of resonant wavelength and bandwidth with sensing structural parameters. (a) Grating height; (b) dielectric layer thickness; (c) grating period; (d) wide-grating width
Fig. 6. Spectral characteristics under different refractive indexes to be measured. (a) Resonant spectra; (b) refractive index curves
Fig. 7. Spectral characteristics under different temperatures. (a) Resonant spectra; (b) temperature curves
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