Near-infrared quantum cutting through a three-step energy transfer process in Nd ³⁺-Yb ³⁺ co-doped fluoroindogallate glasses

Abstract:

The Nd 3+-Yb 3+ couple was investigated in fluoroindogallate glasses using optical spectroscopy to elucidate the energy transfer mechanisms involved in the downconversion (DC) process. Upon excitation of a Nd 3+ ion by an ultraviolet photon, DC through a three-step energy transfer process occurs, in which the energy of the ultraviolet photon absorbed by the Nd 3+ ion is converted into three infrared photons emitted by Yb 3+ ions, i.e.quantum cutting (QC). In addition, with excitation in the visible, our results confirm that the DC process occurs through a one-step energy transfer process, in which the energy of a visible photon absorbed by the Nd 3+ ion is converted into only one infrared photon emitted by an Yb 3+ ion. Time-resolved measurements enabled the estimation of the efficiencies of the cross-relaxation processes between Nd 3+ and Yb 3+ ions. © 2012 IOP Publishing Ltd.

Año de publicación:

2012

Keywords:

Fuente:

scopus

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