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PL spectra taken using several excitation power densities at 95 K. The right inset shows the integrated intensity of the ground state (squares) saturating, while the first excited peak (triangles) increases superlinearly. The left inset demonstrates fitting with two Gaussian peaks for excitation.
PL spectra at 85 K and various magnetic fields, from around 0 (foreground) to 56 T (background). The laser power density on the sample was about . The steps in magnetic field from one spectrum to the next are not constant; spectra are only ordered and then plotted equidistantly. Dashed lines show the two emission peaks used in analysis.
Peak PL emission energy as function of magnetic field at 85 K for the ground state and the first excited state (circles). The lines show the shift in Fock–Darwin states according to simulation.
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