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arXiv · 1906.03013

Magneto-spectroscopy of exciton Rydberg states in a CVD grown WSe2 monolayer

A. Delhomme·G. Butseraen·B. Zheng·L. Marty·V. Bouchiat·M. R. Molas·A. Pan·K. Watanabe·T. Taniguchi·A. Ouerghi·J. Renard·C. Faugeras
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Abstract

The results of magneto-optical spectroscopy investigations of excitons in a CVD grown monolayer of WSe2 encapsulated in hexagonal boron nitride are presented. The emission linewidth for the 1s state is of 4:7 meV, close to the narrowest emissions observed in monolayers exfoliated from bulk material. The 2s excitonic state is also observed at higher energies in the photoluminescence spectrum. Magneto-optical spectroscopy allows for the determination of the g-factors and of the spatial extent of the excitonic wave functions associated with these emissions. Our work establishes CVD grown monolayers of transition metal dichalcogenides as a mature technology for optoelectronic applications.

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A. Delhomme, G. Butseraen, B. Zheng, L. Marty, V. Bouchiat, M. R. Molas, A. Pan, K. Watanabe, T. Taniguchi, A. Ouerghi, J. Renard, C. Faugeras. 2019-06-07. Magneto-spectroscopy of exciton Rydberg states in a CVD grown WSe2 monolayer. https://doi.org/10.1063/1.5095573

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