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. 2017 Jul 19;7:5788. doi: 10.1038/s41598-017-06316-7

Figure 1.

Figure 1

(a) The transmission spectra of un-doped GaN and Mn-doped GaN with different doping concentrations. The original spectra obtained by the commercial instrument (Hitachi U-4100) exhibited Fabry-Perot oscillations due to the high-quality films. The transmission spectra here were smoothed out by adjacent averaging to reveal the intrinsic absorption properties. (b) The schematic diagram illustrates the density of states in Mn-doped GaN.