Figure 5.

Temperature dependence of infrared fluorescence from Tm3+:YCl3. Overlay of temperature-dependent rate model for the relative population of the three lower levels for Tm3+:YCl3 with the temperature-dependent intensity data from Figure 4. The solid lines are the model, and the markers are the data. The population of the 3F4 level at 300 K is normalized to 1. The sample has a Tm3+ concentration of 0.7 × 1020 ions/cm3.

Ganem and Bowman Nanoscale Research Letters 2013 8:455   doi:10.1186/1556-276X-8-455
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