Long-Range Exciton Transport in Microcavity Exciton-Polariton Systems

ORAL

Abstract

It has previously been assumed that the transport distance of excitons in microcavity exciton-polariton systems is limited by the bare exciton diffusion length (≤ 1 μm). In the case of non-resonant excitation, this implies that excitons created by the pump laser would be mostly confined to the pump location. While this is clearly generally true given the close similarities between the spatial pump and lower polariton potential profiles, we show that there is an important minority population of slightly polaritonic excitons that can move distances similar to those of the much more photonic polaritons (≈ 30 μm). This population, which resides in the bottleneck region of the lower polariton branch, is often not detected in a typical photoluminescence experiment due to limited numerical aperture. While small in number compared to the total population of excitons, they can substantially outnumber the polaritons below the bottleneck. This has significant implications for creating potential landscapes using a non-resonant pump, and for measurements of the interaction strength between polaritons.

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Presenters

  • David Myers

    University of Pittsburgh, Physics, University of PIttsburgh, Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh

Authors

  • David Myers

    University of Pittsburgh, Physics, University of PIttsburgh, Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh

  • Shouvik Mukherjee

    University of Pittsburgh, Physics, University of PIttsburgh, Physics and Astronomy, University of Pittsburgh

  • Jonathan Beaumariage

    University of Pittsburgh, Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh

  • Mark Steger

    National Renewable Energy Lab, National Renewable Energy Laboratory

  • Loren Pfeiffer

    Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Department of Electrical Engineering, Princeton University, PRISM, Princeton University, Physics, Princeton University, Electrical Engineering, Princeton

  • Kenneth West

    Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Department of Electrical Engineering, Princeton University, PRISM, Princeton University, Physics, University of Pittsburgh, Electrical Engineering, Princeton

  • David Snoke

    University of Pittsburgh, Physics, University of PIttsburgh, Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh