Eu3+:CaWO4 exhibits four crystal field sites with optical coherence times near 110 microseconds and ground-state hyperfine lifetimes up to roughly 20 minutes, indicating promise for optical quantum memory.
One-hour coherent optical storage in an atomic frequency comb memory
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Optical coherence and hyperfine structure of the 7F0-5D0 transition in EuCaWO4
Eu3+:CaWO4 exhibits four crystal field sites with optical coherence times near 110 microseconds and ground-state hyperfine lifetimes up to roughly 20 minutes, indicating promise for optical quantum memory.