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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 7602–7607

Improved 800 nm emission of Tm3+ sensitized by Yb3+ and Ho3+ in β-NaYF4 nanocrystals under 980 nm excitation

Lili Wang, Weiping Qin, Zhenyu Liu, Dan Zhao, Guanshi Qin, Weihua Di, and Chunfeng He  »View Author Affiliations


Optics Express, Vol. 20, Issue 7, pp. 7602-7607 (2012)
http://dx.doi.org/10.1364/OE.20.007602


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Abstract

In vitro and in vivo bioimaging, Yb/Tm doped fluoride nanocrystals (NCs) as nanoprobes have attracted much attention due to their near infrared (NIR) upconversion (UC) emission at 800 nm under NIR 980 nm excitation. Our paper presents a simple and general method which can further improve the intensity of NIR 800 nm emission of Tm3+ through adding Ho3+ as the second sensitizer of Tm3+ in Yb/Tm doped NaYF4 nanorods. The intensity of the NIR 800 nm emission is demonstrated to increase by up to 3 times along with the adding of Ho3+. Experimental data illustrates that the sensitizations of Tm3+ by both Yb3+ and Ho3+ provide a more efficient energy transfer (ET) route for intense 800 nm emission than that by Yb3+ alone.

© 2012 OSA

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Spectroscopy

History
Original Manuscript: February 14, 2012
Revised Manuscript: March 7, 2012
Manuscript Accepted: March 8, 2012
Published: March 19, 2012

Virtual Issues
Vol. 7, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Lili Wang, Weiping Qin, Zhenyu Liu, Dan Zhao, Guanshi Qin, Weihua Di, and Chunfeng He, "Improved 800 nm emission of Tm3+ sensitized by Yb3+ and Ho3+ in β-NaYF4 nanocrystals under 980 nm excitation," Opt. Express 20, 7602-7607 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-7602


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