Room temperature dynamical control and electroluminescence from microcavity polaritons in monolayer transitional metal dichalcogenides

ORAL

Abstract

We demonstrate modulation of exciton-photon interaction in strong coupling regime showing polariton branches at room temperature in monolayer WS2 field effect transistor embedded inside a microcavity. Transitions from strong to weak coupling happens when WS2 becomes electron doped under gating due to reduction in oscillator strength of the excitons arising from decreased Coulomb interaction. For polariton electroluminescence from a monolayer WS2 at room temperature we incorporate a tunnel field effect transistor with graphene-hBN-WS2-hBN-graphene van der Waal heterostructure inside the microcavity. Injected electrons and holes tunnel through hBN barrier and recombine in the WS2 resulting in luminescence and shows clear polariton branches. Our findings with these new class of materials pave a novel way to realize low energy optoelectronic switches and possibly room temperature based polariton lasers through electrically controlled polariton luminescence.

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Presenters

  • Biswanath Chakraborty

    PHYSICS, City College of New York, City University of New York, New York 10031, USA

Authors

  • Biswanath Chakraborty

    PHYSICS, City College of New York, City University of New York, New York 10031, USA

  • Jie Gu

    PHYSICS, City College of New York, City University of New York, New York 10031, USA, Department of Physics, City College of New York, 160 Convent Ave., New York, NY 10031, USA

  • Zheng Sun

    Physics and Astronomy, University of Pittsburgh, Pittsburgh PA 15260, USA, Physics and Astronomy, University of Pittsburgh

  • Mandeep Khatoniar

    PHYSICS, City College of New York, City University of New York, New York 10031, USA, Physics, Graduate Center, City University of New York, New York, NY 10016, Department of Physics, City College of New York, New York- 10031,USA.

  • REZLIND BUSHATI

    PHYSICS, City College of New York, City University of New York, New York 10031, USA

  • Alexandra Boehmke

    PHYSICS, City College of New York, City University of New York, New York 10031, USA, Department of Physics, City College of New York, 160 Convent Ave., New York, NY 10031, USA

  • Rian Koots

    PHYSICS, City College of New York, City University of New York, New York 10031, USA, Department of Physics, City College of New York, 160 Convent Ave., New York, NY 10031, USA

  • Vinod M Menon

    PHYSICS, City College of New York, City University of New York, New York 10031, USA, Department of Physics, City College of New York, 160 Convent Ave., New York, NY 10031, USA, City College of New York, CUNY, Physics, City College of New York,New York, NY 10031, Physics, City College of New York, City University of New York, Department of Physics, City College of New York, New York- 10031,USA.