(a) Electrical enhancement/reduction of UCE versus wavelength in a Er3+/Yb3+ doubly doped PLZT ceramic slab (the inset is the schematic configuration of the experimental setup); (b) time dependence of the UCE after removing of the external electric field (the inset is a photo taken from the UCE spot).
Configuration of the ABO3 perovskite unit cell for RE doped PLZT: the left diagram is for zero-field; the right diagrams exhibit electro-induced polarizations.
The ratio of I543 and I568 increases monotonous as a function of temperature from 200 to 500 K.
(a) The vacancies distribution in ABO3 perovskite unit cell for RE doped PLZT ceramics; (b) An AFM micrograph of the surface of Er3+/Yb3+ codoped PLZT ceramics; (c)The spectrum taken from typical electrical sparks formed in the air without Er3+ doped PLZT specimen on the way towards the spectrometer; (d) Schematic diagram of energy levels that illustrates distribution of disconnected electrons traps (DET) and recombination centers (DHT), and optical energy storage and optical amplification process.
The direct comparison of UCEs in the Er3+/Yb3+ doubly doped PLZT ceramics before and after UV light exposure.
Random walks for different light in intrinsically disordered Er3+/Yb3+ codoped PLZT ceramics: solid line presents the path of 529 nm and 543 nm UCEs light and dashed line presents for the path of 556 nm, 568 nm, and three red UCEs light.
Changes of the electric dipole transition intensity for different green emission peaks.
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