Interaction of moiré excitons with cavity photons in two-dimensional semiconductor hetero-bilayers

Moiré materials,composed of two single-layer two-dimensional semiconductors,are important because they are good platforms for studying strongly correlated physics.Among them,moiré materials based on transition metal dichalcogen-ides(TMDs)have been intensively studied.The hetero-bilayer can support moiré interlayer excitons if there is a small twist angle or small lattice constant difference between the TMDs in the hetero-bilayer and form a type-Ⅱ band alignment.The coup-ling of moiré interlayer excitons to cavity modes can induce exotic phenomena.Here,we review recent advances in the coup-ling of moiré interlayer excitons to cavities,and comment on the current difficulties and possible future research directions in this field.