High resolution spectroscopy of the F-7(0) <-> D-5(0) transition in Eu3+:KYF4

作者：Bartholomew J G^*; Zhang Z; Di Lieto A; Tonelli M; Goldner Ph

来源：Journal of Luminescence, 2016, 171: 221-225.

DOI：10.1016/j.jlumin.2015.11.025

• Eu3+:KYF4
• Photon echoes
• Dynamic disorder modes
• Electron-phonon interactions

In this paper we report the inhomogeneous and homogeneous linewidths of the F-7(0) <-> D-5(0) optical transition for a number of sites in Eu3+:KYF4. The high frequency resolution obtained in our measurements enabled a sixth europium site to be identified, which was previously unresolved. In addition, preliminary hole burning measurements allow a partial characterization of the Eu-153 isotope hyperfine spin states for two sites and an approximation of the ground-state spin-level lifetime. We also discuss the temperature dependence of the homogeneous linewidth, which was measured by a two-pulse photon echo study. This study is the first photon echo measurement reported for Eu3+ ions in fluoride crystals. The results demonstrate that the low temperature homogeneous broadening is not limited by magnetic contributions but rather by dynamic disorder modes. These measurements also reveal electron-phonon interactions that are significantly different to oxide crystals.

• 出版日期2016-3