Multiphoton upconversion emission switching in Tm,Yb co-doped nanocrystalline yttria

L. Li; G. Z. Dong; X. L. Zhang; M. Nie; J. H. Cui; X. W. Zhang; R. M. Li

doi:10.1117/12.869815

22 November 2010 Multiphoton upconversion emission switching in Tm,Yb co-doped nanocrystalline yttria

L. Li, G. Z. Dong, X. L. Zhang, M. Nie, J. H. Cui, X. W. Zhang, R. M. Li

Proceedings Volume 7847, Optoelectronic Devices and Integration III; 784727 (2010) https://doi.org/10.1117/12.869815
Event: Photonics Asia 2010, 2010, Beijing, China

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.

Citation Download Citation

L. Li, G. Z. Dong, X. L. Zhang, M. Nie, J. H. Cui, X. W. Zhang, and R. M. Li "Multiphoton upconversion emission switching in Tm,Yb co-doped nanocrystalline yttria", Proc. SPIE 7847, Optoelectronic Devices and Integration III, 784727 (22 November 2010); https://doi.org/10.1117/12.869815

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