Háskóli ÍslandsUniversity of IcelandEmmanuele, R. P. A.Sich, M.Kyriienko, O.Shahnazaryan, V.Withers, F.Catanzaro, A.Walker, P. M.Benimetskiy, F. A.Skolnick, M. S.Tartakovskii, A. I.Shelykh, IvanKrizhanovskiǐ, Dmitry N.2020-10-232020-10-232020-07-17Emmanuele, R.P.A., Sich, M., Kyriienko, O. et al. Highly nonlinear trion-polaritons in a monolayer semiconductor. Nature Communications 11, 3589 (2020). https://doi.org/10.1038/s41467-020-17340-z2041-1723https://hdl.handle.net/20.500.11815/2139Publisher's version (útgefin grein)Highly nonlinear optical materials with strong effective photon-photon interactions are required for ultrafast and quantum optical signal processing circuitry. Here we report strong Kerr-like nonlinearities by employing efficient optical transitions of charged excitons (trions) observed in semiconducting transition metal dichalcogenides (TMDCs). By hybridising trions in monolayer MoSe2 at low electron densities with a microcavity mode, we realise trion-polaritons exhibiting significant energy shifts at small photon fluxes due to phase space filling. We find the ratio of trion- to neutral exciton–polariton interaction strength is in the range from 10 to 100 in TMDC materials and that trion-polariton nonlinearity is comparable to that in other polariton systems. The results are in good agreement with a theory accounting for the composite nature of excitons and trions and deviation of their statistics from that of ideal bosons and fermions. Our findings open a way to scalable quantum optics applications with TMDCs.3589eninfo:eu-repo/semantics/openAccessTrion-polaritonsMonolayer semiconductorPhotonTMDCsNonlinearityHálfleiðararLjósfræðiinfo:eu-repo/semantics/articleNature Communications10.1038/s41467-020-17340-z