Figure 5: (a) PL emission from samples A, A (Au), and A (Au)-1. Inset graph shows the absorption for each sample. PL lifetime parameters are shown in the inset table. (b) Hydrogen depth profile of the samples A, A (Au), and A (Au)-1. Au depth profile (filled gray circle) by RBS and Si depth profile (open gray rhomb) by SRIM simulation are shown for comparison.