Reducing decoherence in optical and spin transitions in rare-earth-metal-ion-doped materials

D. L. McAuslan*, J. G. Bartholomew, M. J. Sellars, J. J. Longdell

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    41 Citations (Scopus)

    Abstract

    In many important situations, the dominant dephasing mechanism in cryogenic rare-earth-metal-ion-doped systems is due to magnetic field fluctuations from spins in the host crystal. Operating at a magnetic field where a transition has a zero first-order Zeeman (ZEFOZ) shift can greatly reduce this dephasing. Here we identify the location of transitions with a zero first-order Zeeman shift for optical transitions in Pr3 +:YAG and for spin transitions in Er3 +:Y 2SiO 5. The long coherence times that ZEFOZ can enable would make Pr3 +:YAG a strong candidate for achieving the strong-coupling regime of cavity QED, and would be an important step forward in creating long-lived telecommunications wavelength quantum memories in Er3 +:Y 2SiO 5. This work relies mostly on published spin-Hamiltonian parameters, but Raman heterodyne spectroscopy was performed on Pr3 +:YAG to measure the parameters for the excited state.

    Original languageEnglish
    Article number032339
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume85
    Issue number3
    DOIs
    Publication statusPublished - 30 Mar 2012

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