期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep22433
关键词
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资金
- China Postdoctoral Science Foundation [2015M570816]
- Plan Project of Youth Science and Technology New Star of Shaanxi Province [2015KJXX-33]
- Natural Science Foundation of Shaanxi Province of China [2014JQ1008]
- Special Foundation of Shaanxi Educational Commission [11JK0520]
- Project of Basic Research Foundation of Xi'an University of Architecture and Technology [JC1518]
Luminescence-based waveguide is widely investigated as a promising alternative to conquer the difficulties of efficiently coupling light into a waveguide. But applications have been still limited due to employing blue or ultraviolet light as excitation source with the lower penetration depth leading to a weak guided light. Here, we show a quasi-one-dimensional propagation of luminescence and then resulting in a strong luminescence output from the top end of a single NaYF4:Yb3+/Er3+ microtube under near infrared light excitation. The mechanism of upconversion propagation, based on the optical waveguide effect accompanied with energy migration, is proposed. The efficiency of luminescence output is highly dependent on the concentration of dopant ions, excitation power, morphology, and crystallinity of tube as an indirect evidence of the existence of the optical actived waveguide effect. These findings provide the possibility for the construction of upconversion fiber laser.
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