Ultrafast XUV ARPES Studies of Electron and Exciton Dynamics in the Transition-Metal Dichalcogenide MoSe2

Jan Heye Buß; Frédéric Joucken; Julian Maklar; He Wang; Yiming Xu; Rohit Unni; Changhyun Ko; Sefaattin Tongay; Junqiao Wu; Robert A. Kaindl

doi:10.1364/cleo_qels.2017.fth1f.6

Abstract

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We exploit ultrafast extreme-UV angle-resolved photoemission spectroscopy (XUV ARPES) for sensitive studies of non-equilibrium carrier dynamics in MoSe2. The experiments reveal inter-valley scattering and provide first evidence for the observation of band-gap excitons in ARPES.

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