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Effect of alkali halides on the persistent spectral hole burning in Ge–Ga–S glasses doped with Eu3+
- Source :
-
Journal of Non-Crystalline Solids . Oct2003, Vol. 326-327, p292. 4p. - Publication Year :
- 2003
-
Abstract
- Addition of CsBr and KBr into Eu3+-doped Ge–Ga–S glasses resulted in persistent spectral hole burning with high quantum efficiency, whereas the addition of alkali chloride did not show any evidence for a hole formation process. The characterization of the phonon side band spectra revealed the site for Eu3+ ions located near the Ga–Br− or Ga–Cl− units. The presence of Br− ions near Eu3+ lowers the energy of the conduction band, thereby enabling the interaction between the 4f electrons and the resultant conduction band. The interaction made the photo-reduction of Eu3+ to Eu2+ possible. However, the higher coupling of phonon energy with Eu3+ together with the higher electronegativity of Cl− ion in CsCl-containing glass compared to its CsBr counterpart, hindered the photo-reduction of Eu3+ into Eu2+. [Copyright &y& Elsevier]
- Subjects :
- *GLASS
*OPTICAL hole burning
*PHONONS
Subjects
Details
- Language :
- English
- ISSN :
- 00223093
- Volume :
- 326-327
- Database :
- Academic Search Index
- Journal :
- Journal of Non-Crystalline Solids
- Publication Type :
- Academic Journal
- Accession number :
- 10721363
- Full Text :
- https://doi.org/10.1016/S0022-3093(03)00414-9