Robust optical emission polarization in MoS2 monolayers through selective valley excitation

Abstract

We report polarization resolved photoluminescence from monolayer MoS2, a two-dimensional, non-centrosymmetric crystal with direct energy gaps at two different valleys in momentum space. The inherent chiral optical selectivity allows exciting one of these valleys and close to 90% polarized emission at 4K is observed with 40% polarization remaining at 300K. The high polarization degree of the emission remains unchanged in transverse magnetic fields up to 9T indicating robust, selective valley excitation.

5 pages, 3 figures

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Cited by in corpus (210)

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• Phonon and Raman scattering of two-dimensional transition metal dichalcogenides from monolayer, multilayer to bulk material
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• Experimental demonstration of continuous electronic structure tuning via strain in atomically thin MoS2
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