journal article·2023-10-01Open access

Trapping-induced quantum beats in a van-der-Waals heterostructure microcavity observed by two-dimensional micro-spectroscopy

Donghai Li, Hangyong Shan, Heiko Knopf, Kenji Watanabe, Takashi Taniguchi, Ying Qin, Sefaattin Tongay, Falk Eilenberger, Sven Höfling, Christian Schneider, Tobias Brixner

Optical Materials Express· Volume 13· Issue 10

Abstract

Spatial confinement has been frequently engineered to control the flow and relaxation dynamics of exciton polaritons. While widely investigated in GaAs microcavities, exciton-polariton coupling between discretized polariton modes arising from spatially confined 2D crystals been has been less exhaustively studied. Here, we use coherent 2D photoluminescence-detected micro-spectroscopy to detect oscillating 2D peaks exclusively from a spatial trap in a microcavity with an embedded van-der-Waals heterostructure at room temperature. We observe a wide variation of oscillatory phases as a function of spectral position within the 2D spectrum, which suggests the existence of a coupling between the discretized polariton modes. The latter is accompanied by the generation of coherent phonons.
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Research context

OpenAlex topics: Strong Light-Matter Interactions · Thermal Radiation and Cooling Technologies · Spectroscopy and Quantum Chemical Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

University of Science and Technology of China

University of Oldenburg

Friedrich Schiller University

Fraunhofer-Institute for Applied Optics and Precision Engineering IOF

Max Planck School of Photonics

National Institute for Materials Science

Arizona State University

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · European Research Council · Japan Society for the Promotion of Science · U.S. Department of Energy · Division of Electrical, Communications and Cyber Systems · Division of Materials Research · Division of Civil, Mechanical and Manufacturing Innovation · Bundesministerium für Bildung und Forschung · European Social Fund · Freistaat Thüringen · Julius-Maximilians-Universität Würzburg

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