Abstract
Trivalent terbium ions (Tb3+) present multi-color emissions in the visible due to the 5D4 → 7fj (J = 0 – 6) transitions, with the most intense one at ~544 nm falling into the green spectral range (for J = 5). Tb3+ ions are widely used in green phosphors and as probes in biochemistry. They are also suitable for directly generating visible (green and yellow) laser emission [1]. Currently, visible Tb lasers are based on bulk fluoride crystals, such as tetragonal Tb:LiYF4. In the present work, we report on the Liquid Phase Epitaxy growth and polarized spectroscopic properties of single-crystalline Tb3+, Gd3+-codoped LiYF4 crystalline layers suitable for the development of visible waveguide lasers.
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