Probing Moiré Interlayer Exciton States in van der Waals Heterostructures

Moiré superlattices dramatically modify the properties of electrons and excitons in van der Waals heterostructures by introducing a new length and energy scale. The effect can be especially strong for interlayer excitons, where electrons and holes reside in different layers and are sensitive to the local atomic configuration. For example, it was recently predicted that moiré superlattices can host localized interlayer exciton states with distinct optical selection rules due to an emergent moiré angular momentum. In this talk, I will discuss our effort to observe distinct interlayer exciton states and to probe the possible effects of the moiré angular momentum on the interlayer exciton states.