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Optical spectroscopy of excited exciton states in MoS2 monolayers in van der Waals heterostructures
C. Robert, M. A. Semina, F. Cadiz +12
The optical properties of MoS2 monolayers are dominated by excitons, but for spectrally broad optical transitions in monolayers exfoliated directly onto SiO2 substrates detailed in…
Identifying optical signatures of momentum-dark excitons in transition metal dichalcogenide monolayers
Jessica Lindlau, Cedric Robert, Victor Funk +12
Transition metal dichalcogenide (TMD) monolayers (MLs) exhibit rich photoluminescence spectra associated with interband optical transitions of direct-gap semiconductors. Upon absor…
Fine Structure and Lifetime of Dark Excitons in Transition Metal Dichalcogenide Monolayers
Cedric Robert, Thierry Amand, Fabian Cadiz +7
The intricate interplay between optically dark and bright excitons governs the light-matter interaction in transition metal dichalcogenide monolayers. We have performed a detailed…
Charged excitons in monolayer WSe: experiment and theory
E. Courtade, M. Semina, M. Manca +13
Charged excitons, or X-trions, in monolayer transition metal dichalcogenides have binding energies of several tens of meV. Together with the neutral exciton X they domi…
In-plane Propagation of Light in Transition Metal Dichalcogenide Monolayers: Optical Selection Rules
G. Wang, C. Robert, M. M. Glazov +8
The optical selection rules for inter-band transitions in WSe2, WS2 and MoSe2 transition metal dichalcogenide monolayers are investigated by polarization-resolved photoluminescence…
Excitonic linewidth approaching the homogeneous limit in MoS2 based van der Waals heterostructures : accessing spin-valley dynamics
F. Cadiz, E. Courtade, C. Robert +13
The strong light matter interaction and the valley selective optical selection rules make monolayer (ML) MoS2 an exciting 2D material for fundamental physics and optoelectronics ap…