Fig. 1. 81°TFG耦合光路原理图及偏振相关光谱Light coupling schematic and polarized dependence spectra of 81°TFG

Fig. 2. 实验系统Experimental setup

Fig. 3. 腐蚀前后的81°TFG的显微镜图Microscope photo of 81°TFG before and after etching

Fig. 4. 腐蚀前后81°TFG的RI灵敏度Calibration of RI sensitivity before and after etching

Fig. 5. 81°TFG的表面修饰过程示意图Schematic diagram of 81°TFG surface immobilization

Fig. 6. GO修饰腐蚀型81°TFG的SEM及拉曼光谱图SEM and Raman spectra of GO-coated etched 81°TFG

Fig. 7. GO涂覆TFG前后TM模和TE模光谱变化Spectral changes of TM mode and TE mode before and after TFG coating GO

Fig. 8. 涂覆GO前后腐蚀型81°TFG的RI灵敏度变化(RI范围：1.33~1.38)RI sensitivity of 81°TFG before and after GO coated (RI range: 1.33~1.38)

Fig. 9. 腐蚀型81°TFG表面修饰过程中的谐振波长红移量Wavelength red shift during the surface modification of etched 81° TFG

Fig. 10. BSA免疫检测过程中传感器的光谱及谐振波长漂移量随时间的变化Spectral evolution and wavelength shift against time of the biosensor for BSA detection

Fig. 11. GO集成的81°TFG生物传感器的波长红移与BSA抗原溶液浓度的关系(插图为0~1.5 nmol/L范围的线性拟合)Wavelength red-shifts of the GO-81° TFG biosensor for different BSA concentration levels (Inset: Linear fit for BSA concentration of 0~1.5 nmol/L)