Local structure around Er{sup 3+} in SiO{sub 2}-HfO{sub 2} glassy waveguides using EXAFS
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Dipartimento di Fisica, Universita degli Studi di Trento, Via Sommarive 14, I-38100 Povo (Trento) (Italy)
Er{sup 3+}-doped SiO{sub 2}-HfO{sub 2} glassy waveguides with HfO{sub 2} concentrations ranging from 10 to 50 mol % were prepared using the sol-gel route and deposited on v-SiO{sub 2} substrates using the dip-coating technique. The local environment around Er{sup 3+} ions was determined from Er L{sub 3}-edge extended x-ray-absorption fine-structure (EXAFS) measurements. The first coordination shell around Er{sup 3+} ions is composed of oxygen atoms. Hafnium is the main constituent of the second coordination shell of Er{sup 3+}, differing from the cases of pure SiO{sub 2} and SiO{sub 2}-TiO{sub 2} glassy hosts, in which silicon is the main atomic species. The local structure around Er{sup 3+} ions has been found to be independent on HfO{sub 2} concentration within the studied composition range. This fact implies that Er{sup 3+} ions are preferentially dispersed in HfO{sub 2}-rich regions of the glassy waveguide, even at the lowest HfO{sub 2} concentration. For all samples, no Er{sup 3+}-Er{sup 3+} coordination shell has been detected by EXAFS. The presented structural results allow us to understand some spectroscopic properties typical of Er{sup 3+}-doped SiO{sub 2} glassy waveguides co-doped with HfO{sub 2}.
- OSTI ID:
- 20946384
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 2 Vol. 76; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Self-diffusion of Er in pure and HfO/sub 2/-doped polycrystalline Er/sub 2/O/sub 3/
Er site in Er-implanted Si nanoclusters embedded in SiO{sub 2}
Self-diffusion of Er and Hf inpure and HfO/sub 2/-doped polycrystalline Er/sub 2/O/sub 3/. [Hf-175 and Er-169]
Conference
·
Sat Sep 01 00:00:00 EDT 1979
· J. Am. Ceram. Soc.; (United States)
·
OSTI ID:5643345
Er site in Er-implanted Si nanoclusters embedded in SiO{sub 2}
Journal Article
·
Tue Nov 14 23:00:00 EST 2006
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:20853897
Self-diffusion of Er and Hf inpure and HfO/sub 2/-doped polycrystalline Er/sub 2/O/sub 3/. [Hf-175 and Er-169]
Technical Report
·
Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:6516086