Negative circular polarization emissions from WSe2/MoSe2 commensurate heterobilayers
Journal
Nature Communications
Journal Volume
9
Journal Issue
1
Pages
1-7
Date Issued
2018
Author(s)
Hsu, W.-T.
Lu, L.-S.
Wu, P.-H.
Lee, M.-H.
Chen, P.-J.
Wu, P.-Y.
Chou, Y.-C.
Jeng, H.-T.
Li, L.-J.
Abstract
heterobilayers with well-defined (AA and AB) atomic registry. We observe circularly polarized photoluminescence from interlayer excitons, but with a helicity opposite to the optical excitation. The negative circular polarization arises from the quantum interference imposed by interlayer atomic registry, giving rise to distinct polarization selection rules for interlayer excitons. Using selective excitation schemes, we demonstrate the optical addressability for interlayer excitons with different valley configurations and polarization helicities.
Publisher
Nature Publishing Group
Type
journal article