Journal
JOURNAL OF LUMINESCENCE
Volume 192, Issue -, Pages 963-968Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2017.08.031
Keywords
Luminescent materials; Rare-earth doped materials; Single nanoparticle spectroscopy; Upconversion; Thermometry
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico -CNPq (Brazilian agency)
- Coordenacdo de Aperfeicoamento de Pessoal de Nivel Superior - CAPES (Brazilian agency)
- Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco - FACEPE (Brazilian agency)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESP (Brazilian agency)
- National Photonics Institute - INFo
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We report on Nd3+-doped yttrium oxide polycrystalline nanoparticles synthesis, their basic structural characterization and the observation of phonon-assisted upconversion in single nanoparticles with different Nd3+ doping levels. For upconversion studies, a frequency-locked CW Ti: Sapphire laser operating @ 820 nm, resonant with a Stark level of the Nd3+ ions F-4(5/2) manifold, was used to excite single nanoparticles on a home-made confocal microscope. To the best of our knowledge, luminescence ranging from 630 to 760 nm was observed for the first time from single Nd3+-doped yttria nanoparticles under such excitation conditions. Upconversion studies on different single nanoparticles revealed a good doping homogeneity and the upconversion emissions were found to be one-photon phonon-assisted processes.
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