External electromagnetic field induced electronic structures and novel optical functions of rare-earth-ion-doped glasses

We researched the realization of novel optical functions of glass by combin ing an external electromagnetic held induced electronic structure and rare- earth-ions. We reviewed the phenomena, mechanisms, and the applications of photostimulated luminescence induced by X-ray, long-lasting phosphorescence by ultra-violet light, space-selective manipulation of the valence state o f rare-earth-ion, and the formation of rare-earthion-doped optical waveguid e for light amplification by a focused infrared femtosecond laser. The prop osed concept will lead to a new possibility in the realization of novel opt ical functions for rare-earth-ion-doped glasses.