Figure 3 | Scientific Reports

Figure 3

From: A New Fitting Method for Ambipolar Diffusion Length Extraction in Thin Film Structures Using Photoluminescence Measurement with Scanning Excitation

Figure 3

Experimental results of spatially-integrated PL in the GaAs thin film. (a) The measured temporal evolution of PL signal from the same sample far away from the edge. The logarithmic scale version of the temporal evolution is shown in the inset. (b) Log-log plot of the time-integrated PL intensity as a function of pumping density. The result of linear fitting is also shown in the figure, and the slope of the fitting line is 1.1. (c) Measured SPLM profile for the normalized time-integrated PL intensity. The fitting curve is also shown as the dashed red line for comparison. The dotted black line indicates the edge of the sample. The pumping density in (a,c) is about 290 kW/cm2.

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