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arXiv · 2609.31194

Optical characterization of excited-state spin Hamiltonians and clock transitions at telecommunication wavelength in Tm3+:YAlO3

Akshay Babu Karyath·Luozhen Li·Julien Bertrand·Alexandre Kings·Tianyang Shen·Gabriel Aeppli·Simon Gerber·Guy Matmon·Wolfgang Tittel
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Abstract

The zero-phonon line (ZPL) between the two excited-state manifolds 3F4 and 3H4 of the trivalent thulium ion in yttrium aluminum perovskite (Tm3+:YAlO3) lies within the telecom E-band at around 1451 nm and exhibits an optical coherence time of a few μs at cryogenic temperatures. To improve this time in view of potential applications, e.g. single-photon sources and optical quantum memory, we characterized the magnetic properties of the lowest Stark levels of these two manifolds. Varying the external magnetic field amplitude and orientation, we measured the enhanced nuclear Zeeman splitting by probing the field-dependent frequency detuning of side holes created by means of spectral hole burning, and we characterized the inhomogeneous line shift caused by the quadratic Zeeman interaction. Together, this allowed us to establish the spin Hamiltonians for the lowest Stark level of the 3F4 and 3H4 manifolds, and to predict optical clock transitions for particular orientations and magnitudes of the magnetic field

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Akshay Babu Karyath, Luozhen Li, Julien Bertrand, Alexandre Kings, Tianyang Shen, Gabriel Aeppli, Simon Gerber, Guy Matmon, Wolfgang Tittel. 2026-09-25. Optical characterization of excited-state spin Hamiltonians and clock transitions at telecommunication wavelength in Tm3+:YAlO3. https://arxiv.org/abs/2609.31194

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