Abstract
We report on the optical properties of Nd3+- and Tb3+-doped low-phonon-energy moisture-resistant host crystals, potassium lead bromide (KPb2Br5), and rubidium lead bromide (RbPb2Br5), including absorption, emission, and emission lifetime measurements as well as calculations of the multiphonon decay rate, Judd–Ofelt parameters, and radiative transition probabilities for relevant (laser) transitions in these crystals. The RE3+:MPb2Br5 (M=Rb, K) crystal is a promising candidate for long-wavelength infrared applications because of the low phonon frequencies and other favorable features.
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