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    Exciton-exciton annihilation in MoSe2 monolayers

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    Kumar_exciton-exciton2014.pdf (582.2Kb)
    Issue Date
    2014-03-24
    Author
    Kumar, Nardeep
    Cui, Qiannan
    Ceballos, Frank
    He, Dawei
    Wang, Yongsheng
    Zhao, Hui
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We investigate the excitonic dynamics in MoSe2 monolayer and bulk samples by femtosecond transient absorption. Excitons are resonantly injected by a 750-nm and 100-fs laser pulse, and are detected by measuring a differential reflection of a probe pulse tuned in the range 790–820 nm. We observe a strong density-dependent initial decay of the exciton population in monolayers, which can be well described by the exciton-exciton annihilation. Such a feature is not observed in a bulk sample under comparable conditions. We also observe the saturated absorption induced by excitons in both monolayers and the bulk in the differential reflection measurements, which indicates their potential applications as saturable absorbers.
    Description
    This is the published version. Copyright ©2014 American Physical Society
    URI
    http://hdl.handle.net/1808/19258
    DOI
    https://doi.org/10.1103/PhysRevB.89.125427
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Kumar, Nardeep, Qiannan Cui, Frank Ceballos, Dawei He, Yongsheng Wang, and Hui Zhao. "Exciton-exciton Annihilation in MoSe 2 Monolayers." Phys. Rev. B Physical Review B 89.12 (2014). http://dx.doi.org/10.1103/PhysRevB.89.125427

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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