Fig. 1. Schematic diagram of micro-sphere resonant cavity embedded in tapered capillary

Fig. 2. Schematic diagram of fiber taper coupling system and transmission spectrum of barium titanate micro-sphere

Fig. 3. Fabrication process of tapered capillary

Fig. 4. Experimental reflection spectrum of tapered capillary with solid barium titanate micro-sphere

Fig. 5. Experimental results of temperature sensing with barium titanate microsphere

Fig. 6. Experimental results of tapered capillary with PMMA micro-sphere

Fig. 7. Experimental results of temperature sensing with PMMA micro-sphere