Near infrared and upconversion luminescence of Tm3+-Yb3+codoped CdF2 single crystals
| Autor: | M. Diaf, F. Paz-Buclatin, Inocencio R. Martín, R. Fartas, J.P. Jouart |
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| Rok vydání: | 2020 |
| Předmět: |
Diffraction
Materials science Infrared Near-infrared spectroscopy Biophysics 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics Photon upconversion 0104 chemical sciences Ion law.invention law Atomic physics 0210 nano-technology Luminescence Excitation |
| Zdroj: | Journal of Luminescence. 228:117594 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2020.117594 |
| Popis: | Tm3+, Yb3+: CdF2 single crystals with good optical quality are grown by the standard Bridgman method. The crystal structure is checked by means of X-ray diffraction analysis. Under 800 nm excitation of Tm3+ ions, the samples show an intense infrared band around 1800 nm associated with the 3F4→3H6 transition. The sample exhibit also upconverted luminescence under 975 nm laser excitation which is a signature of an efficient energy transfer between Yb3+ and Tm3+ ions. The pump power dependence of all upconversion intensities have been analyzed in accordance with a proposed upconversion mechanism. The temporal evolution curves of the upconversion emissions obtained for the lowest Tm3+ concentration sample gives longer decays and as result the highest emission upconversion intensities. |
| Databáze: | OpenAIRE |
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