Simultaneous emission lines around 1.05μm, 1.3μm, 1.8μm, 2.1μm and 2.7μm have been observed in LiLaNdHfO:Ho (x=0.00-0.15) under 808nm laser diode excitation. Near-infrared luminescence due to holmium ions with residual concentration in the LiLaHfO host has been studied. The intensity of 2.1 and 2.7μm lines associated with I→I and I→I transitions in Ho depends on the neodymium codopant concentration. This result indicates that Nd ions can be potentially used as sensitizers for Ho ions to stimulate the intense near-infrared emission in this system. Possible energy transfer mechanisms between lanthanide ions have been briefly discussed.
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| http://dx.doi.org/10.1016/j.saa.2017.03.007 | DOI Listing |
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