Contribution a l'etude structurale des systemes RNi2-Hydrogene (R = La, Ce) : leurs applications catalytiques

SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Upconversion emission investigation of Tb3+/Yb3+ codoped CdF2 single crystals under infrared laser pump

International audienc

Laser-induced, Er3+ trace-sensitized red-to-blue photon-avalanche up-conversion in Tm3+:KY3F10

International audienceWe report here the first results of a spectroscopic study of anti-Stokes emissions from a Tm3+-doped KY3F10 crystal demonstrating the sensitization effect of Er3+ ions, present as trace impurities, on the ESA (3F4 → 1G4) lines of Tm3+.We have also detected Ho3+ traces in Tm3+:KY3F10. Contrary to the Er3+ ion, the Ho3+ ion does not increase the possibilities of resonant transfer with the Tm3+ ion. The Tm3+ →Ho3+ →Tm3+ transfers are much less probable than the Tm3+ → Er3+ → Tm3+ transfers. The majority of the Tm3+ ions excited by sensitized photon-avalanche absorption are exclusively located in the immediate neighbourhood of Er3+ ions. Red-to-green up-conversion mechanism is, for Er3+ either a two-step absorption process or a photon-avalanche absorption process, depending on whether the excitation wavelength is tuned on the 4I13/2 → 4F5/2 or 3F4→ 1G4 transitions

Laser-induced, Er3+ trace-sensitized red-to-blue photon-avalanche up-conversion in Tm3+:KY3F10

International audienceWe report here the first results of a spectroscopic study of anti-Stokes emissions from a Tm3+-doped KY3F10 crystal demonstrating the sensitization effect of Er3+ ions, present as trace impurities, on the ESA (3F4 → 1G4) lines of Tm3+.We have also detected Ho3+ traces in Tm3+:KY3F10. Contrary to the Er3+ ion, the Ho3+ ion does not increase the possibilities of resonant transfer with the Tm3+ ion. The Tm3+ →Ho3+ →Tm3+ transfers are much less probable than the Tm3+ → Er3+ → Tm3+ transfers. The majority of the Tm3+ ions excited by sensitized photon-avalanche absorption are exclusively located in the immediate neighbourhood of Er3+ ions. Red-to-green up-conversion mechanism is, for Er3+ either a two-step absorption process or a photon-avalanche absorption process, depending on whether the excitation wavelength is tuned on the 4I13/2 → 4F5/2 or 3F4→ 1G4 transitions

Laser-induced, Er3+ trace-sensitized red-to-blue photon-avalanche up-conversion in Tm3+:KY3F10

International audienceWe report here the first results of a spectroscopic study of anti-Stokes emissions from a Tm3+-doped KY3F10 crystal demonstrating the sensitization effect of Er3+ ions, present as trace impurities, on the ESA (3F4 → 1G4) lines of Tm3+.We have also detected Ho3+ traces in Tm3+:KY3F10. Contrary to the Er3+ ion, the Ho3+ ion does not increase the possibilities of resonant transfer with the Tm3+ ion. The Tm3+ →Ho3+ →Tm3+ transfers are much less probable than the Tm3+ → Er3+ → Tm3+ transfers. The majority of the Tm3+ ions excited by sensitized photon-avalanche absorption are exclusively located in the immediate neighbourhood of Er3+ ions. Red-to-green up-conversion mechanism is, for Er3+ either a two-step absorption process or a photon-avalanche absorption process, depending on whether the excitation wavelength is tuned on the 4I13/2 → 4F5/2 or 3F4→ 1G4 transitions

Red-luminescence analysis of Pr3+ doped fluoride crystals

International audienceWe report here on the absorption and fluorescence properties of the Pr3+ doped crystals LiYF4, BaY2F8, KY3F10, KYF4 and CaF2 emphasizing on their characteristics in the visible domain for blue-diode pumped laser operation around 605 nm

Spectroscopic characterization by up conversion of Ho3+/Yb3+ codoped CdF2 single crystal

International audienc

Red-luminescence analysis of Pr3+ doped fluoride crystals

We report here on the absorption and fluorescence properties of the Pr3+ doped crystals LiYF4, BaY2F8, KY3F10, KYF4 and CaF2 emphasizing on their characteristics in the visible domain for blue-diode pumped laser operation around 605 nm

Abstracts of 1st International Conference on Computational & Applied Physics

This book contains the abstracts of the papers presented at the International Conference on Computational & Applied Physics (ICCAP’2021) Organized by the Surfaces, Interfaces and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria, held on 26–28 September 2021. The Conference had a variety of Plenary Lectures, Oral sessions, and E-Poster Presentations. Conference Title: 1st International Conference on Computational & Applied PhysicsConference Acronym: ICCAP’2021Conference Date: 26–28 September 2021Conference Location: Online (Virtual Conference)Conference Organizer: Surfaces, Interfaces, and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria