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  • Laser-Based Metastable Krypton Generation

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    Author(s)
    Dakka, MA
    Tsiminis, G
    Glover, RD
    Perrella, C
    Moffatt, J
    Spooner, NA
    Sang, RT
    Light, PS
    Luiten, AN
    Griffith University Author(s)
    Sang, Robert T.
    Year published
    2018
    Metadata
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    Abstract
    We demonstrate the generation of metastable krypton in the long-lived 1s5 state using laser excitation. The atoms are excited through a two-photon absorption process into the 2p6 state using a pulsed optical parametric oscillator laser operating near 215 nm, after which the atoms decay quickly into the metastable state with a branching ratio of 75%. The interaction dynamics are modeled using density matrix formalism and, by combining this with experimental observations, we are able to calculate photoionization and two-photon absorption cross sections. When compared to traditional approaches to metastable production, this ...
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    We demonstrate the generation of metastable krypton in the long-lived 1s5 state using laser excitation. The atoms are excited through a two-photon absorption process into the 2p6 state using a pulsed optical parametric oscillator laser operating near 215 nm, after which the atoms decay quickly into the metastable state with a branching ratio of 75%. The interaction dynamics are modeled using density matrix formalism and, by combining this with experimental observations, we are able to calculate photoionization and two-photon absorption cross sections. When compared to traditional approaches to metastable production, this approach shows great potential for high-density metastable krypton production with minimal heating of the sample. Here, we show metastable production efficiencies of up to 2% per pulse. The new experimental results gained here, when combined with the density matrix model we have developed, suggest that fractional efficiencies up to 30% are possible under optimal conditions.
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    Journal Title
    Physical Review Letters
    Volume
    121
    DOI
    https://doi.org/10.1103/PhysRevLett.121.093201
    Copyright Statement
    © 2018 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Mathematical sciences
    Physical sciences
    Other physical sciences not elsewhere classified
    Engineering
    Publication URI
    http://hdl.handle.net/10072/382304
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    • Journal articles

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