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Proceedings Paper

Multiphoton upconversion emission switching in Tm,Yb co-doped nanocrystalline yttria
Author(s): L. Li; G. Z. Dong; X. L. Zhang; M. Nie; J. H. Cui; X. W. Zhang; R. M. Li
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Paper Abstract

Multiphoton upconversion luminescence (UL) properties from the Yb3+-sensitized Tm3+ ions in nanocrystalline yttria host were studied experimentally under 973 nm laser excitation. Bright pure blue luminescence in the visible spectral region was performed even at low pump excitation level. An interesting chromatic switching behavior was observed for the near-infrared and blue spectral bands at room temperature, showing a pump intensity-controlled emission wavelength switcher. The chromatic switching is intrinsically associated with the competition of two-photon UL and three-photon UL processes. Moreover, the wavelength switching of Stark emission of Tm3+ 1G4 state took place as the pump intensity rises enough. This phenomenon is attributed to pump induced photothermal effect changing the distribution of Stark level populations in Tm3+ 1G4 energy state.

Paper Details

Date Published: 22 November 2010
PDF: 7 pages
Proc. SPIE 7847, Optoelectronic Devices and Integration III, 784727 (22 November 2010); doi: 10.1117/12.869815
Show Author Affiliations
L. Li, Harbin Engineering Univ. (China)
G. Z. Dong, Harbin Engineering Univ. (China)
X. L. Zhang, Harbin Engineering Univ. (China)
M. Nie, Harbin Engineering Univ. (China)
J. H. Cui, Harbin Engineering Univ. (China)
X. W. Zhang, Harbin Engineering Univ. (China)
R. M. Li, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 7847:
Optoelectronic Devices and Integration III
Xuping Zhang; Hai Ming; Alan Xiaolong Wang, Editor(s)

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