Bright Red Upconversion Luminescence of Thulium Ion-Doped GeS₂−In₂S₃−CsI Glasses

Abstract

International audienceIn this paper, we report a novel phenomenon in GeS2−In2S3−CsI chalcohalide glasses doped with Tm3+ ions. Under irradiation with an 808 nm laser diode, a bright red emission centered at 700 nm is observed for the first time. By codoping with different concentration of Er3+ ions, emission can be tuned from monochromatic red to green. The Er3+ ions codopant and higher concentration of Tm3+ ions are favoring the 700 nm red emission. Meanwhile, the indium (In) contents plays a significant role on the enhanced upconversion and near-IR emissions. These observations are interesting and may enable the device based on the chalcohalide glass to meet the specific color demands, which have potential applications in the fields of optical and solid state lasers

Energy transfer between doubly doped Er3+, Tm3+and Ho3+ rare earth ions in SiO2 nanoparticles

“…The intensities of Tm 3+ emission peaks were observed to be much stronger as compared to Er 3+ and Ho 3+ emission peaks with the NIR peak dominating. The red emission at 705 nm from Tm 3+ reported to be a standard required emission of RGB colour was measured [14]. Strong blue emission band at 453 and 474 nm, weak red emission at 650 nm and NIR emission at 800 nm from Tm doped BaWO 4 phosphor powder were observed by Li et al [15] at 3 kV accelerating beam voltage.…”

Multifunctional upconversion nanoprobe for tumor fluorescence imaging and near-infrared thermal therapy

“…[3][4][5] . Up-conversion luminescence of UCNP is a process where continuous-wave (CW) low-energy light in the NIR region (typically 980 nm) is converted to higher energy visible or NIR light (typically 545, 654 or 800 nm) through sequential absorption of multiple photons or energy transfer 6,7 . Compared with traditional downconversion fluorescent probes such as quantum dots and organic dyes, UCNPs have prominent advantages such as narrow emission peaks, large stokes shifts, low toxicity, good photostability, as well as the autofluorescence-free nature that offers significantly improved signal-to-noise ratios during imaging.…”

Silver metal enhanced photoluminescence of Tm3+ doped GeS2–Ga2S3–CsCl glasses

“…As an excellent near-IR emitting material, the CsCl modified ChGs have the following merits including good glass-forming ability, high solubility of RE ions and extended transparency into the visible range [12,13]. Recently Tm 3+ doped ChGs have received considerable attention due to the relatively large absorption cross-section of Tm 3+ at 0.8 μm; thus one may use a commercial GaAlAs laser diode as the pump source for both near-IR and visible UC emissions of Tm 3+ [14][15][16][17]. In this paper, we study the silver metal enhanced near infrared and UC luminescence of Tm 3+ doped GeS 2 -Ga 2 S 3 -CsCl chalcohalide glasses.…”