Energy transfer mechanism and Auger effect in Er(3+) coupled silicon nanoparticle samples
- A. Pitanti
- D. Navarro Urrios
- N. Prtljaga
- F. Gourbilleau
- R. Rizk
- B. Garrido
- L. Pavesi
- Daldosso, Nicola
DOIAbstract
We report a spectroscopic study about the energy transfer mechanism among silicon nanoparticles (Si-np), both amorphous and crystalline, and Er ions in a silicon dioxide matrix. From infrared spectroscopic analysis, we have determined that the physics of the transfer mechanism does not depend on the Si-np nature, finding a fast (<200 ns) energy transfer in both cases, while the amorphous nanoclusters reveal a larger transfer efficiency than the nanocrystals. Moreover, the detailed spectroscopic results in the visible range here reported are essential to understand the physics behind the sensitization effect, whose knowledge assumes a crucial role to enhance the transfer rate and possibly employing the material in optical amplifier devices. ...
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