Effect of alkali halides on the persistent spectral hole burning in Ge-Ga-S glasses doped with Eu3+
SCIE
SCOPUS
- Title
- Effect of alkali halides on the persistent spectral hole burning in Ge-Ga-S glasses doped with Eu3+
- Authors
- Chung, WJ; Heo, J; Jha, A
- Date Issued
- 2003-10-01
- Publisher
- ELSEVIER SCIENCE BV
- 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+. (C) 2003 Published by Elsevier B.V.
- Keywords
- RAMAN-SPECTRA
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18342
- DOI
- 10.1016/S0022-3093(03)00414-9
- ISSN
- 0022-3093
- Article Type
- Article
- Citation
- JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 326, page. 292 - 295, 2003-10-01
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