Abstract
We report the successful growth of trivalent erbium-doped lithium calcium aluminum fluoride (Er3+:LiCaAlF6) using the micro-pulling down method. Several absorption bands were observed at 139nm (71,942cm−1), 149nm (67,114cm−1), and 162nm (61,728cm−1), which can be ascribed to 4f→5d transitions in Er3+. Evaluation of its optical properties using the 157-nm emission of a F2 laser reveal that it has a 163-nm vacuum ultraviolet fluorescence with 1.3-μs decay time, involving a transition originating from the high-spin state of the 4f105d excited state configuration. This is one of the shortest emission wavelengths from solid-state materials reported at room temperature.
Published Version
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