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Week-long-lifetime microwave spectral holes in an erbium-doped scheelite crystal at millikelvin temperature

Author

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  • Zhiren Wang

    (Université Paris-Saclay, CEA, CNRS, SPEC
    Université de Sherbrooke)

  • Sen Lin

    (The Chinese University of Hong Kong)

  • Marianne Dantec

    (Université Paris-Saclay, CEA, CNRS, SPEC)

  • Miloš Rančić

    (Université Paris-Saclay, CEA, CNRS, SPEC)

  • Philippe Goldner

    (PSL University, CNRS, Institut de Recherche de Chimie Paris)

  • Sylvain Bertaina

    (Institut Matériaux Microélectronique et Nanosciences de Provence)

  • Thierry Chaneliere

    (Institut Néel)

  • Renbao Liu

    (The Chinese University of Hong Kong)

  • Daniel Esteve

    (Université Paris-Saclay, CEA, CNRS, SPEC)

  • Denis Vion

    (Université Paris-Saclay, CEA, CNRS, SPEC)

  • Emmanuel Flurin

    (Université Paris-Saclay, CEA, CNRS, SPEC)

  • Patrice Bertet

    (Université Paris-Saclay, CEA, CNRS, SPEC)

Abstract

Rare-earth-ions (REI) doped crystals have remarkable optical and spin properties characterized by narrow homogeneous linewidths, which can be studied despite the large inhomogeneous broadening of the ensemble line through spectral hole burning (SHB). Here, we report SHB spectroscopic measurements in a scheelite crystal of CaWO4 by pumping the spin transition of a paramagnetic REI (Er3+) at microwave frequency and millikelvin temperatures, with nuclear spin states of neighboring 183W atoms serving as the auxiliary levels. The repeated application of pairs of microwave pulses generates a periodic modulation of the Er3+ density profile, which we observe spectrally and in the time-domain as an accumulated echo. The lifetime of the holes and accumulated echoes rises steeply as the sample temperature is decreased, exceeding a week at 10mK. Our results demonstrate that millikelvin temperatures can be beneficial for signal processing applications requiring long spectral hole lifetimes.

Suggested Citation

  • Zhiren Wang & Sen Lin & Marianne Dantec & Miloš Rančić & Philippe Goldner & Sylvain Bertaina & Thierry Chaneliere & Renbao Liu & Daniel Esteve & Denis Vion & Emmanuel Flurin & Patrice Bertet, 2025. "Week-long-lifetime microwave spectral holes in an erbium-doped scheelite crystal at millikelvin temperature," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-64087-6
    DOI: 10.1038/s41467-025-64087-6
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