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Abstract: The emission and absorption spectra of Er3+ ions in Er2O3 powder are investigated at room temperature. The crystal field splitting of 4I15/2, 4I13/2, 4I9/2 and 4S3/2 multiplets of Er3+ was calculated using a parameterized Hamiltonian including crystal field terms. A final standard deviation of 5.3cm−1 is obtained between 22 calculated and experimental Stark. The strength crystal field parameters of Er2O3 powder are compared to those of erbium doped Y2O3 single crystal. In addition, the location of the ground and the first excited states of Er3+ in Er2O3 powder is determined. The 4I15/2 ground state of Er3+ is located at 12750cm−1 below the valence band edge. The 4I13/2 and 4I11/2 multiplets are set in resonance with the valence band. A configuration coordinate diagram is proposed for Er3+ in Er2O3 powder. [Copyright &y& Elsevier]

In the previous paper [J. Alloys Compd. 102 (2019) 873–878], optical and Judd-Ofelt (J-O) spectroscopic properties of Er3+/Pr3+-codoped Gd 3 Ga 5 O 12 single-crystal have been reported and the J-O study was performed on the basis of measured absorption spectrum of the crystal. Present paper reports corrected absorption spectrum and J-O spectroscopic parameters of the crystal, which include J-O intensity parameters, oscillator strengths, fluorescence branch ratios, radiative rates and radiative lifetimes. Comparison shows that the previous paper erroneously reported almost one order of magnitude larger absorption cross-section, J-O intensity parameters, oscillator strength and radiative rate as well. A further comparison with previously reported results of Er3+-only doped crystal reveals that the Pr3+-codoping causes considerable spectroscopic change in absorption cross-section, J-O intensity parameters, oscillator strength and radiative rate of Er3+ transitions, and the reason of the change is discussed from the viewpoint of Pr3+-codoping and crystal growth procedure effect on ion environment of Er3+. In addition, errors are given for both the J-O parameters and radiative probabilities of several typical Er3+ emissions. [ABSTRACT FROM AUTHOR]