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Emmanuele, 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, I A; Krizhanovskii, D N
Nature communications, 07/2020, Letnik: 11, Številka: 1Journal Article
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 MoSe 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.
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