Figure 4.

Refractive index of different isopropanol and ethanol concentrations in water measured with our analysis of multiple WGMs. Spectra were acquired and analyzed for 50 fluorescent microspheres at each concentration, each point corresponds to the average of the refractive index distribution. The uncertainties represent the standard deviation of each distribution. The lines labeled reference in this case are measures taken with standard optical methods [28]

Charlebois et al. Nanoscale Research Letters 2010 5:524-532   doi:10.1007/s11671-010-9541-1