Correlation of the shifts on the Er-doping level. ΔR (right axis, blue empty triangles) and Δλ (left axis, red full triangles) plotted as a function of the nominal Er content for a series of 1.25-μm-thick PSi samples. The lines are intended only as guide for the eye. For the definition of ΔR and Δλ, see Figure 8.
Mula et al. Nanoscale Research Letters 2012 7:376 doi:10.1186/1556-276X-7-376