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Laser Site-Selective Spectroscopy and Magnetic Hyperfine Splittings of Ho$^{3+}$ doped Y$_{2}$SiO$_{5}$ (2409.15625v2)
Published 24 Sep 2024 in cond-mat.mtrl-sci, physics.atom-ph, and quant-ph
Abstract: Laser site-selective spectroscopy and high-resolution absorption measurements have been used to determine 51 crystal-field energy levels for one of the Ho${3+}$ centres in Y${2}$SiO${5}$. This centre is denoted as Site 2 and has been tentatively assigned as the seven-fold coordinated centre. High resolution absorption measurements reveal complex hyperfine patterns that obey and approximate selection rule. The application of a magnetic field along the three optical axes reveals the presence of avoided crossings below 0.5 Tesla, in both the ground and excited states.