Figure 1From: Controlling the Er content of porous silicon using the doping current intensityEvolution of the PSi optical thickness nd as a function of the doping current. The red circles are the ratio of the nd values (n is the refractive index and d the physical thickness) before and after the doping process. The transferred charge is the same for all samples. The line fit is to be intended as a guide for the eyes.Back to article page