Narrow optical linewidths in stoichiometric layered rare-earth crystals

• URL: http://arxiv.org/abs/2411.02683v1
• Date: Mon, 04 Nov 2024 23:49:41 GMT
• Title: Narrow optical linewidths in stoichiometric layered rare-earth crystals
• Authors: Donny R. Pearson Jr., Ashwith Prabhu, Selvin Tobar, Jack D'Amelio, Amy Tram, Zachary W. Riedel, Daniel P. Shoemaker, Elizabeth A. Goldschmidt,
• Abstract summary: Rare-earth emitters in solids are well-suited for implementing efficient, long-lived quantum memory. We show narrow optical linewidths in a layered stoichiometric crystalline material.
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• Abstract: Rare-earth emitters in solids are well-suited for implementing efficient, long-lived quantum memory coupled to integrated photonics for scalable quantum technologies. They are typically introduced as dopants in a solid-state host, but this introduces disorder and limits the available density of emitters. Stoichiometric materials can offer high densities with narrow optical linewidths. The regular spacing of emitters also opens possibilities for quantum information processing and collective effects. Here we show narrow optical linewidths in a layered stoichiometric crystalline material, NaEu(IO$_3$)$_4$. We observed an inhomogeneous linewidth of 2.2(1) GHz and a homogeneous linewidth of 120(4) kHz. Using spectral hole-burning techniques, we observe a hyperfine spin lifetime of 1.9(4) s. Furthermore, we demonstrate an atomic frequency comb delay of up to 800 ns.

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