The bright and dark exciton coherent coupling enabled by the external magnetic fields.

ORAL

Abstract

Magnetic field and polarization-dependent measurements on monolayer WSe2 were performed using time-integrated four-wave mixing spectroscopy. Magnetic fields up to 25T were applied parallel to the monolayer plane, and the partial brightening of the dark excitonic state was observed as an increase in dephasing time. The polarization-dependent study shows the coherent quantum beating between the states when higher magnetic fields were applied. The results were then modeled using time-dependent density functional theory.

–

Presenters

  • Varun Mapara

    • University of South Florida

Authors

  • Varun Mapara

    • University of South Florida

  • Arup Barua

    • University of South Florida

  • Minh Tuan Trinh

    • University of South Florida

  • Christopher E Stevens

    • University of South Florida
    • Air Force Research Laboratory, Sensors Directorate, Wright-Patterson Air Force Base, Ohio, 45433, USA

  • Fang Liu

    • Stanford Univ

  • Xiaoyang Zhu

    • Columbia University
    • Columbia Univ

  • Stephen McGrill

    • National High Magnetic Field Labs, Florida
    • National High magnetic field Laboratory
    • National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA

  • Volodymyr Turkowski

    • University of Central Florida

  • Denis Karaiskaj

    • Univ of South Florida