Abstract
The excited state dynamics and near-infrared (IR) luminescent properties of Nd3+-doped melt-quenched aluminophosphate glass containing silver and tin have been investigated under pulsed-laser and steady-state excitation at 266 nm. A comparative emission dynamics assessment was carried out concerning Ag and Sn dopants in the glass matrix with and without neodymium. The data indicates an effective non-radiative energy transfer from single Ag+ ions and Sn centers as donors to neodymium activator ions which ultimately populates the 4F3/2 emitting state in Nd3+. As a result, the near-IR (1.06 μm) emission from the 4F3/2 metastable state in Nd3+ is enhanced about an order of magnitude relative to a purely Nd-doped reference. In addition, the 4F3/2 excited state lifetime becomes significantly longer in the presence of silver and tin. A comparative 31P nuclear magnetic resonance spectroscopy study suggests glass depolymerization upon neodymium doping. It is proposed that a structural alteration might be linked to the established non-radiative energy transfer.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 88-92 |
| Number of pages | 5 |
| Journal | Optical Materials |
| Volume | 46 |
| DOIs | |
| State | Published - Aug 1 2015 |
| Externally published | Yes |
Keywords
- Energy transfer
- Glasses
- Photoluminescence
- Rare-earths
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- General Computer Science
- Atomic and Molecular Physics, and Optics
- Spectroscopy
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Electrical and Electronic Engineering