Fig. 1. Experimental setup for measuring resonant spectrum of microsphere cavity

Fig. 2. Q value test chart of SiO2 microsphere cavity

Fig. 3. WGM resonant spectrum of SiO2 microsphere cavity with diameter of 206 μm

Fig. 4. WGM resonant spectrum of TiO2-SiO2 hybrid microsphere cavity with diameter of 206 μm

Fig. 5. Broadband spectral mode resonant characteristics of SiO2 and TiO2-SiO2 microsphere cavities with diameters of 206 μm

Fig. 6. Broadband spectral mode resonant characteristics of SiO2 and TiO2-SiO2 microsphere cavities with diameters of 134 μm