Preparation and up-conversion luminescence properties of Er: YbAG and Er: YAG single crystals

Wu, Limin; Cheng, Zeyu; Xu, Shoulei; Wu, Wenxia; Wang, Yazhao; Zhang, Huiting; Zhu, Zhonghua; Zeng, Ninghan; Goodman, Bernard Albert; Deng, Wen

doi:10.1016/j.jmst.2023.10.038

Cited by 3 publications

(3 citation statements)

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“…The absorption spectra of x Yb/Tm/Ho codoped cubic zirconia (x = 0.25, 0.75, 3.00, 5.00, 7.00) single crystals in the 200−1100 nm range (Figure 3a) clearly show the characteristic absorption peaks of Tm 3+ at 351, 454, 675, and 785 nm and a strong broad absorption band of Yb 3+ in the 838−1010 nm range, which increases its absorption of 980 nm photons. 19 No transitions corresponding to absorptions of Ho 3+ were detected in these crystals because of the low concentration of Ho 3+ . 27 The optical band gaps of the crystal samples obtained by extrapolating the linear part of the absorption edge are 4.84, 4.78, 4.72, 4.65, and 4.61 eV, respectively, and indicate that the E g values decrease with increasing Yb 2 O 3 concentration (Figure 3b).…”

Section: Resultsmentioning

confidence: 91%

“…The absorption spectra of x Yb/Tm/Ho codoped cubic zirconia ( x = 0.25, 0.75, 3.00, 5.00, 7.00) single crystals in the 200–1100 nm range (Figure a) clearly show the characteristic absorption peaks of Tm 3+ at 351, 454, 675, and 785 nm and a strong broad absorption band of Yb 3+ in the 838–1010 nm range, which increases its absorption of 980 nm photons . No transitions corresponding to absorptions of Ho 3+ were detected in these crystals because of the low concentration of Ho 3+ .…”

Section: Resultsmentioning

confidence: 99%

“…In this process, due to the strong absorption in the 838–1010 nm range, Yb 3+ is able to sensitize Tm 3+ and Ho 3+ under excitation with a 980 nm laser. Tm 3+ emits blue and red lights, and Ho 3+ emits green light through multiphoton upconversion processes in Yb/Tm/Ho codoped materials, − and full-color lighting can be achieved by carefully controlling the concentrations of Tm 2 O 3 , Ho 2 O 3 , and Yb 2 O 3 in the matrix materials. Consequently, it is possible to obtain bright white light emission and produce a solid white light source excited by a near-infrared light-emitting diode.…”

Section: Introductionmentioning

confidence: 99%

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Ultraviolet and White Light Emissions from Multiphoton Upconversion Transitions in Yb/Tm/Ho Codoped Cubic Zirconia Single Crystals Excited by NIR

Wu,

Wang,

et al. 2024

ACS Photonics

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Under excitation at 980 nm, Tm 3+ may emit ultraviolet, blue, and red light, and Ho 3+ may emit green light through multiphoton upconversion processes in Yb/Tm/Ho codoped materials. However, because the probability of the electron population of the higher excited state energy levels is much lower than that of the lower ones in multiphoton upconversion processes, it is difficult to observe the ultraviolet emission of Tm 3+ -doped single crystals under excitation at 980 nm. Here, we report that high-quality single crystals of cubic ZrO 2 codoped with Tm 2 O 3 , Ho 2 O 3 , and Yb 2 O 3 are successfully grown by the optical floating zone method, and ultraviolet emission at 308 nm was observed for the first time from multiphoton upconversion transitions in these highly transparent, low phonon energy single crystals under excitation at 980 nm. This result demonstrates the prospect of making ultraviolet solid-state lasers pumped by nearinfrared light. Moreover, bright white light was emitted from the single crystal prepared with 5.00 mol % Yb 2 O 3 , 0.75 mol % Tm 2 O 3 , 0.0075 mol % Ho 2 O 3 , 2.2425 mol % Y 2 O 3 , and 92.00 mol % ZrO 2 under excitation at 980 nm, and a bright solid white light source excited by a near-infrared light-emitting diode for practical use is presented.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%