Nature of the luminescence from YAG:Cr<sup>3+</sup>
J P Hehir; M O Henry; J P Larkin; G F Imbusch; J P Hehir; Univ. Coll., Galway, Ireland; M O Henry; Univ. Coll., Galway, Ireland; J P Larkin; Univ. Coll., Galway, Ireland; G F Imbusch; Univ. Coll., Galway, Ireland
Журнал:
Journal of Physics C: Solid State Physics
Дата:
1974-06-21
Аннотация:
The radiative efficiency of YAG:Cr<sup>3+</sup> is known to increase rapidly with increasing temperature. This increase is larger than that expected purely on the basis of the increase with temperature of the R line sidebands. It is shown that this increase in radiative efficiency is mainly due to luminescence from the <sup>4</sup>T<sub>2</sub> state which is about 1000 cm<sup>-1</sup> above <sup>2</sup>E and which becomes populated during optical pumping at higher temperatures.
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