Upconverting Tm3+ doped Ba–Y–Yb–F thin film waveguides for visible and ultraviolet light sources

Abstract

We report the results of Tm3+ doped Ba–Y–Yb–F thin film planar waveguides in glassy form, which produced red, green, blue, and ultraviolet upconverted luminescence when pumped by infrared radiation at λ=960 nm. The films of nominal composition BaYYbF8 doped with 1% Tm have been deposited with both thermal and e-beam evaporation techniques on substrates of fused silica, Si, and GaAs. Planar waveguiding was demonstrated for the films deposited on fused silica. Optimal deposition conditions with respect to the ability of the films to produce upconverted luminescence and low propagation loss are discussed.

Frequency upconversion emissions in layered lead–germanate–tellurite glasses for three-color display

“…Although the Yb 3+ emission ( 2 F 5/2 ! 2 F 7/2 ) does not overlap with the absorption of Tm 3+ , energy transfer (ET) can also occur [12,13]. For the blue emission, three stepwise ET and Yb 3+ ( 2 F 5/2 ) + Tm 3+ ( 3 H 4 ) !…”

Chelating agent and substrate effect on hydrothermal growth of Yb3+/Er3+ doped NaYf4 film

“…It finds extensive applications in the areas of photothermal and photodynamic therapy [1,2], nanothermometers [3], imaging labels [4], heavy metal detection [5] and multiplex biosensing [6]. Additionally, UC materials are being projected as a promising material for applications in the areas of multilayer optical storage disks [7], photoluminescent display screen [8], photovoltaic cells [9,10], diagnostics platform [11], improved cell culture analysis devices [12], optical security systems [13] and optical waveguides [14] requiring development of novel upconverting films (UCF) on the desired substrates.…”

Upconversion Emission from Yb3+ and Tm3+ Codoped NaYF4 Thin Film Prepared by Thermal Evaporation

“…18 Among them, thermal evaporation is a traditional method for thin film preparation, and it is widely used due to its advantages of simplicity, time saving, low cost, etc.…”