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

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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• Band nesting and exciton spectrum in monolayer MoS${}_2$
• Rydberg excitons and polaritons in monolayer transition metal dichalcogenides in a magnetic field
• Magneto-optical conductivity of monolayer transition metal dichalcogenides in the presence of proximity-induced exchange interaction and external electrical field
• $WS{e}_2$ Monolayers Grown by Molecular Beam Epitaxy on hBN
• Photoluminescence efficiency of MBE-grown MoSe${}_2$ monolayers featuring sharp excitonic lines and diverse grain structures
• Heteroepitaxial growth of high optical quality, wafer-scale van der Waals heterostrucutres
• Moire-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe2 Bilayers