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Nanomaterials 2018, 8(7), 497; https://doi.org/10.3390/nano8070497

Multi-Band Up-Converted Lasing Behavior in NaYF4:Yb/Er Nanocrystals

1
Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Optoelectronic Engineering,, Shenzhen University, Shenzhen 518060, China
2
University Research Facility in Materials Characterization and Device Fabrication, The Hong Kong Polytechnic University, Hong Kong 999077, China
3
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China
*
Authors to whom correspondence should be addressed.
Received: 24 May 2018 / Revised: 3 July 2018 / Accepted: 3 July 2018 / Published: 5 July 2018
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Abstract

Random lasers have attracted great interests and extensively investigation owing to their promising applications. Here, we explored unambiguously the multi-band up-converted random lasing from NaYF4:Yb,Er nanocrystals (NCs). NaYF4:Yb,Er NCs exhibit high effective up-conversion luminescence when they are excited by continuous wave 980 nm laser. We investigated a planar microcavities approach wherein the NaYF4:Yb,Er NCs showed up-converted lasing behavior. The optical pumping of NaYF4:Yb,Er NCs by 980 nm pulsed laser excitation exhibited multi-band lasing. The NaYF4:Yb,Er NCs showed multi-band lasing emission with a line width of 0.2 nm at 540 nm and 0.4 nm at 660 nm. This research promotes potential application in bioimaging and biomedical fields. View Full-Text
Keywords: random laser; nanomaterials; up-conversion random laser; nanomaterials; up-conversion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Peng, Y.-P.; Lu, W.; Ren, P.; Ni, Y.; Wang, Y.; Yan, P.; Zeng, Y.-J.; Zhang, W.; Ruan, S. Multi-Band Up-Converted Lasing Behavior in NaYF4:Yb/Er Nanocrystals. Nanomaterials 2018, 8, 497.

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