Phonon-assisted cooperative energy transfer and frequency upconversion in a Yb3+/Tb3+ codoped fluoroindate glass

Abstract

We report large thermal enhancement of the frequency upconversion ͑UC͒ process due to cooperative energy transfer ͑CET͒ in a Yb 3ϩ /Tb 3ϩ codoped fluoroindate glass obtained by heating the sample from 308 to 530 K. To study the influence of multiphonon transitions in the UC process we chose anti-Stokes quasiresonant excitation of Yb 3ϩ ions which were used as sensitizers. UC of radiation at 1064 nm into blue and green light was obtained. Various emission lines of Tb 3ϩ were observed between 400 and 700 nm due to CET from Yb 3ϩ to Tb 3ϩ ions. A rate equation model was used to describe the temperature dependence of the UC emission intensities and the theoretical results are in good agreement with the experimental data.

Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses

“…Recently, research focus on rare-earth doped glasses is not limited to infrared optical devices, and there is a growing interest in visible optical devices [9][10]. With the increasing demand of various visible lasers and light sources, further investigations in other rare-earth ions, such as Dy, Tb, Sm and Eu ions, are becoming more important [11][12][13][14][15][16][17].…”

Magnetic resonance study of the crystallization behavior of InF3-based glasses doped with Cu2+, Mn2+ and Gd3+

“…Rare-earth doped fluoride glasses have been the subject of intense investigations during the last decade, partly because of their potential importance in the development of optical devices based on active glass materials, such as solid state lasers and optical fiber amplifiers [1][2][3][4][5]. Since the optical and spectroscopic properties of active glass materials are strongly affected by devitrification, the study of the crystallization phenomena of these materials is of scientific and technological importance.…”

Cooperative and non-cooperative sensitization upconversion in lanthanide-doped LiYbF4 nanoparticles

“…4e). [29][30][31] Meanwhile, it is worth emphasizing that the UCL branching ratios of 5 D 4 → 7 F J ( J = 6, 5, 4 and 3) transitions of Tb 3+ exhibited also a dependence on temperature with a typical transition point at ∼100 K (Fig. 4c) for T > 100 K, phonon-assisted CET is dominant; for T < 100 K, a sequence of two cooperative absorption steps, namely, ground-state absorption (GSA)/ESA within a weakly coupled Yb 3+ -Tb 3+ dimer dominates (Fig.…”