Electrically tunable ultrafast dynamics and interactions of hybrid excitons in semiconducting bilayers

ORAL

Abstract

Optically active two-dimensional materials host a variety of excitonic species with a high degree of controllability. In particular, the dipolar nature of layer-hybridized excitons in van der Waals bilayers can be modulated by an applied vertical electric field. However, the tunable interactions and dynamics of hybrid species remains largely unexplored until now. In this work, we unveil the modulation of dipolar interactions and ultrafast temporal dynamics of hybrid excitons in field-effect devices based on bilayer transition metal dichalcogenides. Our work opens up new venues for the time-domain study of electrically tunable dipolar excitons in van der Waals heterostructures.

*This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 894369 (Marie Curie Sklodowska ITN network “2-Exciting”). This work was financially supported by the Swiss National Science Foundation (grant no. 215089). AG, CL, SDC, CS, and GC acknowledge funding from the European Horizon EIC Pathfinder Open programme under grant agreement no. 101130384 (QUONDENSATE). This work reflects only authors’ view and the European Commission is not responsible for any use that may be made of the information it contains. AG, SDC, and GC acknowledge financial support by the European Union’s NextGenerationEU Programme with the I-PHOQS Infrastructure [IR0000016, ID D2B8D520, CUP B53C22001750006] “Integrated Infrastructure Initiative in Photonic and Quantum Sciences”. The Marburg group acknowledges funding from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via SFB 1083 (project B9) as well as regular DFG project 512604469. K.W. and T.T. acknowledge support from JSPS KAKENHI (Grant Numbers 19H05790, 20H00354 and 21H05233).

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Publication: Planned paper title: Electrically tunable ultrafast dynamics and interactions of hybrid excitons in semiconducting bilayers

Presenters

  • Edoardo Lopriore

    • Ecole Polytechnique Federale de Lausanne

Authors

  • Edoardo Lopriore

    • Ecole Polytechnique Federale de Lausanne

  • Charalambos Louca

    • Politecnico di Milano

  • Armando Genco

    • Politecnico di Milano

  • Irantzu Landa Garcia

    • Politecnico di Milano

  • Daniel Erkensten

    • Philipps-Universität Marburg

  • Charles Sayers

    • Politecnico di Milano

  • Samuel Brem

    • Philipps-Universität Marburg

  • Raul Perea-Causin

    • Stockholm University

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Christoph Gadermaier

    • Politecnico di Milano

  • Ermin Malic

    • University of Marburg

  • Giulio Cerullo

    • Politecnico di Milano

  • Stefano Dal Conte

    • Politecnico di Milano

  • Andras Kis

    • Ecole Polytechnique Federale de Lausanne
    • École Polytechnique Fédérale de Lausanne