New Hole-Burning Observations in Eu3+-Ion-Doped Glasses



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The irradiation of Eu3+-ion-doped glasses by X-rays allows a new hole- formation phenomenon, being neither persistent nor transient, to be observed. The stable, persistent formation of spectral holes occurs by two-step electron transfer through an activated Eu3+-ion state during laser irradiation (see figure). This new observation is very significant when considering the hole-burning mechanism and developing new persistent spectral hole-burning (PSHB) materials.