Fig. 1. Principle diagrams of SPR and LSPR

Fig. 2. Schematic diagrams of prism-coupling SPR sensor structures. (a) Otto configuration; (b) Kretschmann configuration

Fig. 3. Schematic diagram of fiber optic SPR sensor

Fig. 4. Resonance spectrum of fiber optic SPR sensor

Fig. 5. D-shaped fiber SPR structure

Fig. 6. U-shaped fiber SPR structure

Fig. 7. Tapered fiber SPR structure

Fig. 8. Multimode single-mode multimode fiber SPR structure

Fig. 9. Schematic of SPR sensor based on multiloop hexagonal microstructured fiber

Fig. 10. D-shaped PCF SPR sensor

Fig. 11. Schematic of side polished fiber optic SPR magnetic field sensor

Fig. 12. Fiber optic SPR chemical sensor for detection of heavy metal ions in contaminated water

Fig. 13. Schematic of fiber optic SPR sensor for uric acid detection

Fig. 14. Schematic of fiber optic SPR sensor for detection of melamine using MIP technique

Fig. 15. Antibody-antigen based fiber optic SPR sensors for detection of progesterone in dairy milk