Table 2.

Figures of merit and performance metrics of the four ball resonators reported in this work.

No.	Diameter (μm)	Max. RL (dB)	Wavelength Shift		Amplitude Change
			Sensitivity (nm/RIU)	R2	Sensitivity (dB/RIU)	R2
1	547	−49.4	−118.13	0.9872	−445.7	0.9990
2	532	−40.6	−48.91	0.9729	−256.0	0.9887
3	494	−40.4	−99.75	0.9896	−395.3	0.9964
4	466	−56.6	−403.29	0.9787	−566.2	0.9912