Figure 7
Energy levels of Er3+ ions (a) and the crystal field splitting of energy levels of 4S3/2 (b) and 4F9/2 (c) of the Er3+ ion in NaNbO3 nano-crystals.
Figure 7 | Scientific Reports
Energy levels of Er3+ ions (a) and the crystal field splitting of energy levels of 4S3/2 (b) and 4F9/2 (c) of the Er3+ ion in NaNbO3 nano-crystals.
