Spectral characteristics of solid solutions LiY1−x Lu x F4 doped by Ce3+ ions

Низамутдинов, А. С.; Семашко, В. В.; Naumov, A. K.; Nurtdinova, L. A.; Abdulsabirov, R. Yu.; Кораблева, С. Л.; Efimov, V. N.

doi:10.1134/s1063783408090096

Cited by 14 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Before moving into photon absorption optimization, we note that even though this optimum concentration analysis is performed explicitly for nanocrystals, it is also applicable to bulk materials. A recent spectroscopic experiment 29 on a bulk material indicates that the optimum concentration may be around 4%-5%, validating our prediction.…”

Section: Optimum Dopant Concentrationsupporting

confidence: 87%

Enhanced laser cooling of rare-earth-ion-doped nanocrystalline powders

Ruan

Kaviany

2006

Phys. Rev. B

View full text Add to dashboard Cite

The enhanced laser cooling performance of rare-earth-ion-doped nanocrystalline powders is predicted, compared to the bulk material, using Yb 3+ :Y 2 O 3 as the model material. This is achieved by enhancing the off-resonance, phonon-assisted absorption, which is proportional to the three factors considered in this paper: the dopant concentration, the pumping field energy, and the excitation coefficient. Using the energy transfer theory for concentration quenching, the optimum concentration corresponding to the maximum cooling power is found to be considerably larger than the currently used value, suggesting noticeable enhancement effects for laser cooling. The pumping field energy is enhanced in random nanopowders compared with bulk crystals under the same irradiation, due to the multiple scattering of photons. Photons are thus localized in the medium and do not propagate through, increasing the photon absorption of the pumping beam ͑and it is shown that the reabsorption of the fluorescence is negligible͒. Using molecular dynamics simulations, the phonon density of states ͑DOS͒ of the nanopowder is calculated, and found to have broadened modes, and extended small tails at low and high frequencies. The second-order electronic transition rate for the anti-Stokes luminescence is calculated using the Fermi golden rule, which includes the influence of this phonon DOS, and is shown to have enhancement effects on the laser cooling efficiency using nanopowders. It is finally concluded that these three enhancement mechanisms are essentially to increase the population of the three participating carriers ͑electron, photon, and phonon͒ in the interacting volume, and this also points out directions for enhancing laser cooling performance in bulk materials.

show abstract

Section: Optimum Dopant Concentrationsupporting

confidence: 87%

Enhanced laser cooling of rare-earth-ion-doped nanocrystalline powders

Ruan

Kaviany

2006

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…Other fluoride crystals activated by trivalent ytterbium ions have been intensively studied. Thus [3][4][5] reported on the basic spectroscopic properties of YLiF 4 , LuLiF 4 , KY 3 F 10 , N 4 Y 6 F 22 crystals activated by Yb 3+ ions, while [6] reported on realization of tunable continuous-wave lasing with differential efficiency up to 50% based on Yb 3+ :YLiF 4 crystals. Analysis of the results in [3][4][5][6] shows that the luminescence spectrum of Yb 3+ ions in fluoride crystals, owing to electron-phonon interaction, appears as broad bands with no pronounced structure on the long-wavelength wing, which also is why the indicated materials are attractive for studying the conditions for designing femtosecond lasers based on them.…”

Section: Introductionmentioning

confidence: 99%

Spectral kinetic properties of Yb3+:Na4Y6F22 and Yb3+:LiLuF4 crystals

et al. 2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…The absorption and luminescence spectra of Pr 3+ and Ce 3+ ions in LiY 0.3 Lu 0.7 F 4 , LiLuF 4 and LiYF 4 crystals are presented in figures 1 and 2. The ground state absorption (GSA) spectra in the visible spectral range (figure 1) correspond to the 4f-4f transitions of Pr 3+ ions [5]. In contrast to these, the 4f-5d transitions of Ce 3+ ions and the 4f 2 -4f 1 5d transitions of Pr 3+ ions (figure 2) are observed in the UV and vacuum UV (VUV) regions [5,11].…”

Section: Pump-probe Experimentsmentioning

confidence: 99%

“…The ground state absorption (GSA) spectra in the visible spectral range (figure 1) correspond to the 4f-4f transitions of Pr 3+ ions [5]. In contrast to these, the 4f-5d transitions of Ce 3+ ions and the 4f 2 -4f 1 5d transitions of Pr 3+ ions (figure 2) are observed in the UV and vacuum UV (VUV) regions [5,11]. The π-polarized excited-state absorption (ESA) cross-section spectra from the 1 D 2 manifold of Pr 3+ ions in LiLuF 4 and LiYF 4 crystals [12], and the π-polarized stimulated emission (SE) cross-section spectrum of the 5d-4f transitions of Ce 3+ ions in LiY 0.3 Lu 0.7 F 4 mixed crystals are also shown.…”

Section: Pump-probe Experimentsmentioning

confidence: 99%

“…However, because of low dopant concentrations, and hence low energy transfer efficiency from Pr 3+ to Ce 3+ ions, together with inefficient depopulation of the intermediate 1 D 2 , 3 Pj manifolds of the 4f5d states of Pr 3+ ions, transient absorption of the probing radiation was observed instead of optical gain. To increase dopant concentration, LiY 0.3 Lu 0.7 F 4 (LYLF) crystal, which has the greatest isomorphic capacity for Pr 3+ and Ce 3+ ions among the series of LiY 1−x Lu x F 4 (x = 0..1) mixed crystals, can be used [5,6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

First observation of optical gain on 5d–4f transitions of Ce³⁺ions in up-conversionally pumped Ce³⁺, Pr³⁺:LiY_0.3Lu_0.7F₄mixed crystals

et al. 2015

View full text Add to dashboard Cite

The results of pump–probe experiments on the 5d–4f transitions of Ce3+ ions in up-conversionally pumped Ce3+, Pr3+:LiY0.3Lu0.7F4 crystals are presented and differential gain in the ultraviolet spectral range is demonstrated for the first time. The key parameters for the processes providing up-conversion pumping of the 5d states of Ce3+ ions in Ce3+, Pr3+:LiY0.3Lu0.7F4 mixed crystals via the 1D2 level of Pr3+ ions are estimated for the first time and the optimal pumping conditions are determined. The results of the pump–probe experiments and the mathematical modeling demonstrate that there are good prospects for the use of LiY0.3Lu0.7F4:Ce3+, Pr3+ crystals as an active medium of solid-state tunable UV lasers with up-conversion pumping.

show abstract

Spectral characteristics of solid solutions LiY1−x Lu x F4 doped by Ce3+ ions

Cited by 14 publications

References 4 publications

Enhanced laser cooling of rare-earth-ion-doped nanocrystalline powders

Enhanced laser cooling of rare-earth-ion-doped nanocrystalline powders

Spectral kinetic properties of Yb3+:Na4Y6F22 and Yb3+:LiLuF4 crystals

First observation of optical gain on 5d–4f transitions of Ce³⁺ions in up-conversionally pumped Ce³⁺, Pr³⁺:LiY_0.3Lu_0.7F₄mixed crystals

Contact Info

Product

Resources

About

Spectral characteristics of solid solutions LiY1−x Lu x F4 doped by Ce3+ ions

Cited by 14 publications

References 4 publications

Enhanced laser cooling of rare-earth-ion-doped nanocrystalline powders

Enhanced laser cooling of rare-earth-ion-doped nanocrystalline powders

Spectral kinetic properties of Yb3+:Na4Y6F22 and Yb3+:LiLuF4 crystals

First observation of optical gain on 5d–4f transitions of Ce3+ions in up-conversionally pumped Ce3+, Pr3+:LiY0.3Lu0.7F4mixed crystals

Contact Info

Product

Resources

About

First observation of optical gain on 5d–4f transitions of Ce³⁺ions in up-conversionally pumped Ce³⁺, Pr³⁺:LiY_0.3Lu_0.7F₄mixed crystals