The study of two-color excitation upconversion of Pr(0.5)Yb(3):ZBLAN

Abstract

The excited state absorption upconversion of Pr(0.5)Yb(3):ZBLAN glass material, under two-color excitation of the 960 nm semiconductor laser and the Xe lamp light simultaneously, is reported in this article. It was found that the upconversion emission spectra of 480.1, 519.0, 601.9 and 631.8 nm coincide with the common emission spectra. Meanwhile, the upconversion-excitation spectrum has three obvious peaks under two-color excitation, and they respectively correspond to the 856.0 nm upconversion excitation transition [ 1 G 4 (Pr 3+ )→ 1 I 6 (Pr 3+ ) and 1 G 4 (Pr 3+ )→ 3 P 1 (Pr 3+ )], the 789.0 nm upconversion excitation transition 1 G 4 (Pr 3+ )→ 3 P 2 (Pr 3+ ), and the 803.7 nm upconversion excitation transition 3 H 6 (Pr 3+ )→ 1 D 2 (Pr 3+ ). The upconversion excitation transition 1 G 4 (Pr 3+ )→ 1 I 6 (Pr 3+ ) is strong because its oscillator strength f = 23.040×10 −6 is large, which results in a large peak appearing in the upconversion excitation spectrum. That is just the new interesting two-color excitation upconversion luminescence phenomenon of Pr(0.5)Yb(3):ZBLAN induced by one laser and one continuous normal light simultaneously.

Ultraviolet and visible upconversion luminescence of Tm(0.1)Yb(5):FOV oxyfluoride nanophase vitroceramics

“…A thorough analysis about the experimental results of Figures 4 and 5 better reveals the physical law behind the experimental results [25,26] . It is clear that the slopes of the double logarithmic logF − logP curves are smaller obviously than the value determined by the normal multi-photon relation owing to the characteristic upconversion luminescence saturation phenomenon.…”

Enhanced two-step two-frequency upconversion luminescence in a core/shell/shell nanostructure

“…Afterwards, a research boom on RE-doped fluoride glass for 3-D display has been set off in China. For example, Hou, Chen and Sun et al studied and optimized the TSTF UCL performances of RE-doped fluoride glasses and analyzed their application prospects in volumetric 3-D display [31][32][33] .…”

“…Rare-earth (RE)-doped two-step two-frequency upconversion (TSTF-UC) materials have attracted great interest owing to their unique process in which invisible near-infrared light at two different wavelengths is absorbed sequentially and afterwards converted to visible light [1][2][3][4] (Fig. 1), which is now being explored for its potential use in 3-D displays, [5][6][7][8][9][10][11] lasers, [12][13][14] solar cells [15][16][17] and super resolution fluorescence imaging. 18 In particular, these materials with high transparency and brightness make them suitable for volumetric 3-D display.…”

“…For example, Hou, Chen and Sun et al studied and optimized the TSTF UCL performances of RE-doped fluoride glasses and analyzed their application prospects in volumetric 3-D displays. [31][32][33] However, fluoride glasses doped with RE 3+ ions are always accompanied by deep colors and poor UCL contrast, which may lead to an impure 3-D color display and low resolution. 34 In addition, restricted by the growth process, providing a large and perfect fluoride crystal is not easy.…”

“…For example, Hou, Chen and Sun et al studied and optimized the TSTF UCL performances of RE-doped fluoride glasses and analyzed their application prospects in volumetric 3-D displays. 31–33…”