Related papers: Spectroscopy and Coherence of an Excited-State Transition in $\text{Tm}^{3+}$:$\text{YAlO}

Spectroscopy and Coherence of an Excited-State Transition in $\text{Tm}^{3+}$:$\text{YAlO}_{3}$ at Telecommunication Wavelength

URL: http://arxiv.org/abs/2511.05370v2
Date: Mon, 10 Nov 2025 10:59:07 GMT
Title: Spectroscopy and Coherence of an Excited-State Transition in $\text{Tm}^{3+}$:$\text{YAlO}_{3}$ at Telecommunication Wavelength
Authors: Luozhen Li, Akshay Babu Karyath, Mohsen Falamarzi Askarani, Maria Gieysztor, Hridya Meppully Sasidharan, Joshua A. Slater, Aaron D. Marsh, Philip J. T. Woodburn, Charles W. Thiel, Rufus L. Cone, Sara Marzban, Nir Alfasi, Patrick Remy, Wolfgang Tittel,
Abstract summary: We characterize the spectroscopic and coherence properties of the 1451.37 nm excited-state zero-phonon line (ZPL) in a rare-earth crystal.<n>Our results suggest the possibility of exploiting such transitions for quantum technology.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We characterize the spectroscopic and coherence properties of the 1451.37 nm excited-state zero-phonon line (ZPL) between the $^{3}F_{4}$ and the $^{3}H_{4}$ manifolds of a thulium-doped yttrium aluminum perovskite ($\text{Tm}^{3+}$:$\text{YAlO}_{3}$) crystal at temperatures around 1.5 K. We measure the absorption spectrum between the $^{3}H_{6}$ - $^{3}F_{4}$ and $^{3}F_{4}$ - $^{3}H_{4}$ manifolds, the inhomogeneous broadening of the $^{3}F_{4}$ - $^{3}H_{4}$ (excited-state) ZPL, and the lifetimes of the higher-lying and lower-lying excited states. We also investigate spectral hole-burning spectra with varying magnetic fields, which provides insight into hyperfine and superhyperfine interactions. Using again spectral holes but also optical free induction decays (FIDs), we assess optical coherence times, finding a maximum of 1.1 $\mu s$ when a 2T magnetic field is applied. Our results -- the first to demonstrate coherence of an excited-state transition in a rare-earth crystal -- suggest the possibility of exploiting such transitions for quantum technology.

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