Three- and two-photon upconversion luminescence switching in Tm3+/Yb3+-codoped sodium niobate nanophosphor

Kagola Upendra Kumar; Wagner Ferreira da Silva; Kummara Venkata Krishnaiah; Chalicheemalapalli K. Jayasankar; Carlos Jacinto

doi:10.1117/1.JNP.8.083093

26 March 2014 Three- and two-photon upconversion luminescence switching in Tm3+/Yb3+-codoped sodium niobate nanophosphor

Kagola Upendra Kumar, Wagner Ferreira da Silva, Kummara Venkata Krishnaiah, Chalicheemalapalli K. Jayasankar, Carlos Jacinto

Author Affiliations +

Journal of Nanophotonics, Vol. 8, Issue 1, 083093 (March 2014). https://doi.org/10.1117/1.JNP.8.083093

Abstract

Intense infrared-to-visible upconversion (UC) emission in Tm ³+ /Yb ³+ -codoped sodium niobate (NaNbO₃ ) nanocrystals under resonant excitation at 976 nm is presented. The results showed that by increasing the pump power/intensity, a strong reduction is observed at the 800/480 nm emitted intensity ratio, characterizing what can be denominated as laser pump power-induced color tunability or luminescent switching. The physical origin is discussed with a focus on tailoring of luminescent switchers to operate at a large pump power range and, indeed, it is intrinsically associated with the competition of the two- and three-photon UC processes and with highly efficient UC emissions in the investigated material. The effect of Yb ³+ -ion concentration along with the theoretical aspects on luminescence switching has been investigated. The results obtained here could be useful in the field of sensors and networks for optical processing and optical communications.

Citation Download Citation

Kagola Upendra Kumar, Wagner Ferreira da Silva, Kummara Venkata Krishnaiah, Chalicheemalapalli K. Jayasankar, and Carlos Jacinto "Three- and two-photon upconversion luminescence switching in Tm3+/Yb3+-codoped sodium niobate nanophosphor," Journal of Nanophotonics 8(1), 083093 (26 March 2014). https://doi.org/10.1117/1.JNP.8.083093

Published: 26 March 2014

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