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Erbium-Doped LiYF4 as a Potential Solid-State Frequency Reference: Eligibility and Spectroscopic Assessment

Cerrato, Erik ; Gionco, Chiara ; Rizzelli Martella, Giuseppe ; Clivati, Cecilia ; Gaudino, Roberto ; Calonico, Davide

Crystals (Basel), 2023-10, Vol.13 (10), p.1476 [Periódico revisado por pares]

Basel: MDPI AG

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  • Título:
    Erbium-Doped LiYF4 as a Potential Solid-State Frequency Reference: Eligibility and Spectroscopic Assessment
  • Autor: Cerrato, Erik ; Gionco, Chiara ; Rizzelli Martella, Giuseppe ; Clivati, Cecilia ; Gaudino, Roberto ; Calonico, Davide
  • Assuntos: atomic frequency reference ; Erbium ; Fluorides ; Frequency standards ; Lasers ; Low temperature ; Optical lattices ; Oxidation ; Purity ; rare-earth ions ; single crystal ; Single crystals ; Solid state ; Symmetry ; Temperature ; Vapor phases
  • É parte de: Crystals (Basel), 2023-10, Vol.13 (10), p.1476
  • Descrição: Time and frequency metrology is a key enabler for both forefront science and innovation. At the moment, atomic frequency standards (AFSs) are based on atoms either in the vapor phase or trapped in magneto-optical lattices in a vacuum. Finding a solid-state material that contains atoms suitable to be used as a frequency reference would be an important step forward in the simplification of the setup of AFSs. Lanthanide-doped inorganic crystals, such as Er-doped LiYF4, have been studied for several decades, and their intrashell 4f transitions are usually identified as ultra-narrow. Nevertheless, a systematic characterization of these transitions and their linewidths with a correlation to the dopant’s concentration and isotopic purity at low temperatures is lacking. In this work, we studied Er-doped LiYF4 as a potential benchmark material for solid-state frequency references. We chose Er as it has a set of transitions in the telecom band. The influence of Er concentrations and isotope purity on the transition linewidth was systematically studied using high-resolution optical spectroscopy at 5 K. The results indicate that the material under study is an interesting potential candidate as a solid-state frequency reference, having transition linewidths as low as 250 MHz at ~1530 nm.
  • Editor: Basel: MDPI AG
  • Idioma: Inglês
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