Study of Yb<sup>3+</sup>-Yb<sup>3+</sup> and Yb<sup>3+</sup>-Ce<sup>3+</sup> energy transfer in Yb,Ce:CaGd<sub>4</sub>Si<sub>3</sub>O<sub>13</sub> (Yb,Ce:CGS) crystals
I V Voroshilov; V A Lebedev; A N Gavrilenko; B V Ignatiev; V A Isaev; A V Shestakov; I V Voroshilov; Kuban State University, 149, Stavropolskaya Street, 350040, Krasnodar, Russia; V A Lebedev; Kuban State University, 149, Stavropolskaya Street, 350040, Krasnodar, Russia; A N Gavrilenko; Kuban State University, 149, Stavropolskaya Street, 350040, Krasnodar, Russia; B V Ignatiev; Kuban State University, 149, Stavropolskaya Street, 350040, Krasnodar, Russia; V A Isaev; Kuban State University, 149, Stavropolskaya Street, 350040, Krasnodar, Russia; A V Shestakov; Kuban State University, 149, Stavropolskaya Street, 350040, Krasnodar, Russia
Журнал:
Journal of Physics: Condensed Matter
Дата:
2000-03-27
Аннотация:
The Yb radiative lifetime of 923 µs has been determined by the extrapolation to the zero concentration of Yb. Quenching of the Yb luminescence is observed in the Yb<sup>3+</sup> ,Ce<sup>3+</sup> :CaGd<sub>4</sub> Si<sub>3</sub> O<sub>13</sub> (Yb,Ce:CGS) crystals due to their intrinsic defects and Ce<sup>3+</sup> ions. The main quenching mechanism is the energy migration through Yb ions to the defects with a micro-parameter C<sub>DD</sub> (Yb-Yb) = 1.0 × 10<sup>-38</sup> cm<sup>6</sup> s<sup>-1</sup> , and the Yb<sup>3+</sup> Ce<sup>3+</sup> energy transfer with a micro-parameter C<sub>DA</sub> = 5.5 × 10<sup>-44</sup> cm<sup>6</sup> s<sup>-1</sup> .
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