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arXiv · 2106.03739

Coherent exciton-exciton interactions and exciton dynamics in a MoSe\textsubscript{2}/WSe\textsubscript{2} heterostructure

Torben L. Purz·Eric W. Martin·Pasqual Rivera·William G. Holtzmann·Xiaodong Xu·Steven T. Cundiff
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Abstract

Coherent coupling between excitons is at the heart of many-body interactions with transition metal dichalcogenide (TMD) heterostructures as an emergent platform for the investigation of these interactions. We employ multi-dimensional coherent spectroscopy on monolayer MoSe\textsubscript{2}/WSe\textsubscript{2} heterostructures and observe coherent coupling between excitons spatially localized in monolayer MoSe$_2$ and WSe$_2$. Through many-body spectroscopy, we further observe the absorption state arising from free interlayer electron-hole pairs. This observation yields a spectroscopic measurement of the interlayer exciton binding energy of about 250 meV.

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Torben L. Purz, Eric W. Martin, Pasqual Rivera, William G. Holtzmann, Xiaodong Xu, Steven T. Cundiff. 2021-06-07. Coherent exciton-exciton interactions and exciton dynamics in a MoSe\textsubscript{2}/WSe\textsubscript{2} heterostructure. https://doi.org/10.1103/physrevb.104.l241302

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