Optical and spin coherence of Er$^{3+}$ in epitaxial CeO$_2$ on silicon
- URL: http://arxiv.org/abs/2309.16785v1
- Date: Thu, 28 Sep 2023 18:22:56 GMT
- Title: Optical and spin coherence of Er$^{3+}$ in epitaxial CeO$_2$ on silicon
- Authors: Jiefei Zhang, Gregory D. Grant, Ignas Masiulionis, Michael T. Solomon,
Jasleen K. Bindra, Jens Niklas, Alan M. Dibos, Oleg G. Poluektov, F. Joseph
Heremans, Supratik Guha, David D. Awschalom
- Abstract summary: We report on the optical homogeneous linewidth and electron spin coherence of Er$3+$ ions doped in CeO$$ epitaxial film.
The long-lived optical transition near 1530 nm in the environmentally-protected 4f shell of Er$3+$ shows a narrow homogeneous linewidth of 440 kHz.
The reduced nuclear spin noise in the host allows for Er$3+$ electron spin polarization at 3.6 K, yielding an electron spin coherence of 0.66 $mu$s and a spin relaxation of 2.5 ms.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: Solid-state atomic defects with optical transitions in the telecommunication
bands, potentially in a nuclear spin free environment, are important for
applications in fiber-based quantum networks. Erbium ions doped in CeO$_2$
offer such a desired combination. Here we report on the optical homogeneous
linewidth and electron spin coherence of Er$^{3+}$ ions doped in CeO$_2$
epitaxial film grown on a Si(111) substrate. The long-lived optical transition
near 1530 nm in the environmentally-protected 4f shell of Er$^{3+}$ shows a
narrow homogeneous linewidth of 440 kHz with an optical coherence time of 0.72
$\mu$s at 3.6 K. The reduced nuclear spin noise in the host allows for
Er$^{3+}$ electron spin polarization at 3.6 K, yielding an electron spin
coherence of 0.66 $\mu$s (in the isolated ion limit) and a spin relaxation of
2.5 ms. These findings indicate the potential of Er$^{3+}$:CeO$_2$ film as a
valuable platform for quantum networks and communication applications.
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