Tailorable Upconversion White Light Emission from Pr³⁺ Single‐Doped Glass Ceramics via Simultaneous Dual‐Lasers Excitation

Abstract

White lasers are promising illuminants for emerging visible light communication, which can overcome bottlenecks of lower energy conversion efficiencies and output powers in traditional white light‐emitting (WLE) diodes. However, optical gain materials for white lasers are suffering from great challenges of material growth and growth‐compatible cavity structure where lasing of all three elementary colors can be supported simultaneously. Here, an exquisite physical strategy is demonstrated to realize simultaneous red, green, and blue (RGB) upconversion (UC) photoluminescence for white light modulation for the first time, namely using dual lasers at 850 and 980 nm to stimulate easy‐fabricated glass ceramics (GCs) fiber laser materials (Pr3+ single‐doped germanium oxyfluoride GCs). It is shown that tailorable white light is much more sensitive to lower dopant concentration for GCs than that for glass. Furthermore, compared to glass, UC fluorescence intensities in GCs have approximately two orders of magnitude enhancement. The feasibility of the judicious dual‐lasers excitation tactic is validated for high efficacious RGB fluorescence emission for white light from Pr3+ single‐doped GCs via electronics transition dynamics and theoretical calculations. The white light emission from Pr3+ single‐doped GCs, adjusted by simultaneous dual‐lasers excitation, may open a novel door to develop white light GCs fiber lasers for application in future wireless communication.

Novel Er3+/Ho3+‐codoped glass‐ceramic fibers for broadband tunable mid‐infrared fiber lasers

“…Combining the advantages of the low phonon energy of fluoride nanocrystals and the outstanding chemical durability and thermal stability of the oxide glass matrix, oxyfluoride glass-ceramics (GCs) have been considered as potential candidates for rare-earth-doped fiber lasers. [12][13][14][15][16] However, regretfully, there is neither report on the fabrication of Er 3+ /Ho 3+ -codoped oxyfluoride GC fibers, nor the investigation of broadband tunable MIR spectroscopic properties of these fibers to our best knowledge. If so, the application of the fiber in MIR fiber lasers will be seriously limited.…”

White‐Light Emission from Dual‐Way Photon Energy Conversion in a Dye‐Encapsulated Metal–Organic Framework

“…Alternatively, WLE can also be achieved by photon up-conversion process, applying NIR excitation with low photon energies.However, such implementation has so far been restricted in rare-earth-doped inorganics,w hich are facing the urgent problem of scarce resources and environmental issues. [23] To tackle from another route,t wo-photon excited emission (TPEF) in some organic and metal-organic materials provides an alternative opportunity to achieve multiple colored luminescence as aw hite-light source under NIR excitation. Such emission undergoes atwo-photon absorption (TPA) process,b earing the advantages of deeper tissue penetration, tight focusing area, reduced autofluorescence, and improved signal-to-noise ratios.…”

Fabrication and microstructure of perovskite CsPbCl3 nanocrystallized chalcogenide glass‐ceramics

“…Crystallization of optically functional nanocrystals or quantum dots in oxide glasses has been well demonstrated to achieve good thermal and chemical stabilities . In recent years, thus, various oxide glasses have been employed to protect CsPbX 3 perovskite nanocrystals.…”

“…[2][3][4] Crystallization of optically functional nanocrystals or quantum dots in oxide glasses has been well demonstrated to achieve good thermal and chemical stabilities. [5][6][7][8] In recent years, thus, various oxide glasses have been employed to protect CsPbX 3 perovskite nanocrystals. Novel photonic properties and applications were also explored in such glassceramic materials, such as unique luminescence and random lasing properties.…”