Cavity-control of interlayer excitons in van der Waals heterostructures

Monolayer transition metal dichalcogenides integrated in optical microcavities host exciton-polaritons as a hallmark of the strong light-matter coupling regime. Analogous concepts for hybrid light-matter systems employing spatially indirect excitons with a permanent electric dipole moment in heterob...

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Published inNature communications Vol. 10; no. 1; pp. 3697 - 6
Main Authors Förg, Michael, Colombier, Léo, Patel, Robin K., Lindlau, Jessica, Mohite, Aditya D., Yamaguchi, Hisato, Glazov, Mikhail M., Hunger, David, Högele, Alexander
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 16.08.2019
Nature Publishing Group
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Summary:Monolayer transition metal dichalcogenides integrated in optical microcavities host exciton-polaritons as a hallmark of the strong light-matter coupling regime. Analogous concepts for hybrid light-matter systems employing spatially indirect excitons with a permanent electric dipole moment in heterobilayer crystals promise realizations of exciton-polariton gases and condensates with inherent dipolar interactions. Here, we implement cavity-control of interlayer excitons in vertical MoSe 2 -WSe 2 heterostructures. Our experiments demonstrate the Purcell effect for heterobilayer emission in cavity-modified photonic environments, and quantify the light-matter coupling strength of interlayer excitons. The results will facilitate further developments of dipolar exciton-polariton gases and condensates in hybrid cavity – van der Waals heterostructure systems. Cavity-enhanced light-matter interaction in the weak-coupling regime is known to result in Purcell enhancement. Here the authors demonstrate Purcell enhancement in the photoluminescence of vertical MoSe 2 -WSe 2 heterostructures coupled to a micro-cavity and determine the light-matter coupling strength for interlayer excitons.
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-019-11620-z