Acoustically Driven Stark Effect in Transition Metal Dichalcogenide Monolayers

The Stark effect is one of the most efficient mechanisms to manipulate many-body states in nanostructured systems. In mono- and few-layer transition metal dichalcogenides, it has been successfully induced by optical electric field means. Here, we tune emission energies dissociate excitonic MoSe2 monolayers employing 220 MHz in-plane piezoelectric carried surface acoustic waves. We transfer high dielectric constant substrates, where neutral exciton binding energy reduced, allowing us efficiently quench (above 90%) red-shift emissions. A model for acoustically yields trion polarizabilities 530 630 × 10–5 meV/(kV/cm)2, respectively, which are considerably larger than those reported encapsulated hexagonal boron nitride. Large an attractive ingredient modulate multiexciton interactions two-dimensional semiconductor nanostructures optoelectronic applications.