Chaoying Shi, Xiuhong Liu, Jinhua Hu, Haiyan Han, Jijun Zhao, "High performance optical sensor based on double compound symmetric gratings," Chin. Opt. Lett. 20, 021201 (2022)
- Chinese Optics Letters
- Vol. 20, Issue 2, 021201 (2022)
Fig. 1. Schematic of the sensor based on the DCSG structure.
Fig. 2. Reflection spectra of DG and DCSG at normal incidence of TE waves.
Fig. 3. Electric field intensity distributions of the eigenmode in different DCSGs with various spacings: (a) d = 200 nm, (b) d = 220 nm, (c) d = 240 nm, (d) d = 260 nm.
Fig. 4. Reflection responses of the DCSG for the TE polarization with different d: (a) d = 200 nm, (b) d = 220 nm, (c) d = 240 nm, (d) d = 260 nm.
Fig. 5. DCSG reflection spectra for TE polarization with different nc.
Fig. 6. DCSG resonance peak wavelength versus nc.
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Table 1. Eigenvalues of the TE Eigenmode with Different d
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Table 2. FWHM, S d
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Table 3. Eigenvalues of TE Eigenmodes Corresponding to Different Refractive Indices
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