Related papers: Infrared Absorption and Laser Spectroscopy of Ho$^{3+}$ Doped K$_2$YF$

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

URL: http://arxiv.org/abs/2510.16345v1
Date: Sat, 18 Oct 2025 04:18:06 GMT
Title: Infrared Absorption and Laser Spectroscopy of Ho$^{3+}$ Doped K$_2$YF$_5$ Microparticles
Authors: Pakwan Chanprakhon, Michael F. Reid, Jon-Paul R. Wells,
Abstract summary: This optical data is used for crystal-field modelling of the electronic structure of Ho$3+$ in K$$YF$_5$ microparticles.<n>Temperature dependence of the fluorescent lifetime of the $5$F$_5$ multiplet is measured.<n> measurements of infra-red to visible upconversion in microparticles co-doped with Ho$3+$ and Yb$3+$ is reported.
Score: 0.0
License: http://creativecommons.org/licenses/by-nc-nd/4.0/
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.

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