 The interaction between excitons strongly coupled to light is key for accessing quantum many-body phenomena in polariton systems. Atomically thin two-dimensional semiconductors provide an attractive platform for strong light matter coupling due to many controllable excitonic degrees of freedom. Recently, the emergence of hybridized interlayer excitons, HIX, in bilayer MOS2 has allowed for the observation of highly non-linear excitonic and polaritonic effects. These excitons possess an out-of-plane electric dipole as well as an unusually large oscillator strength, allowing for the observation of dipolar polaritons, dipolaritons, in bilayers in optical microcavities. Compared to excitons and polaritons in monolayers of MOS2, HIX and dipolaritons exhibit approximately eight times higher non-linearity, which is further strongly enhanced when HIX and intralayer excitons, sharing the same valence band, are excited simultaneously. This provides access to an unusual non-linear regime which can be described as a combination of poorly exclusion and exciton-exciton interactions. This article was offered by Sherry Lambo's Luca, Amando Jenko, Salvatore Kiovasso, and others. We are article.tv, links in the description below.