Infrared Absorption and Laser Spectroscopy of Ho${}^{3+}$ Doped K${}_2$YF${}_5$ Microparticles

Abstract

High-resolution absorption and laser spectroscopy are used to determine electronic energy levels for Ho${}^{3+}$ ions in K${}_2$YF${}_5$ microparticles. A total of 72 crystal-field energy levels, distributed among 8 multiplets, are assigned. This optical data is used for crystal-field modelling of the electronic structure of Ho${}^{3+}$ in K${}_2$YF${}_5$. Partially-resolved hyperfine splittings are accurately reproduced by the model. The temperature dependence of the fluorescent lifetime of the ${}^5$F${}_5$ multiplet is measured and the temperature dependence of the non-radiative relaxation is modelled by a five-phonon process. Preliminary measurements of infra-red to visible upconversion in microparticles co-doped with Ho${}^{3+}$ and Yb${}^{3+}$ is reported.

References in corpus (4)

• Electron-Nuclear Interactions as a Test of Crystal-Field Parameters for Low Symmetry Systems: Zeeman-Hyperfine Spectroscopy of Ho${}^{3+}$ Doped Y${}_2$SiO${}_5$
• Growth and Spectroscopy of Lanthanide Doped Y${}_2$SiO${}_5$ Microcrystals for Quantum Information Processing
• Laser Site-Selective Spectroscopy and Magnetic Hyperfine Splittings of Ho${}^{3+}$ doped Y${}_2$SiO${}_5$
• Zeeman-Hyperfine Measurements of a Pseudo-Degenerate Quadruplet in CaF${}_2$:Ho${}^{3+}$

Cited by in corpus (1)

• Spectroscopy of Sm${}^{3+}$ Ions in the C${}_{\mathrm{s}}$ Symmetry Centres of Hydrothermally Prepared K${}_2$YF${}_5$ Microcrystals