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# Non-Local Exciton-Photon Interactions in Hybrid High-Q Beam Nanocavities with Encapsulated MoS2 Monolayers

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Jul 2021

Atomically thin semiconductors can be readily integrated into a wide range ofnanophotonic architectures for applications in quantum photonics and noveloptoelectronic devices. We report the observation of non-local interactions of\textit{free} trions in pristine hBN/MoS$_2$/hBN heterostructures coupled tosingle mode (Q $>10^4$) quasi 0D nanocavities. The high excitonic and photonicquality of the interaction system stem from our integrated nanofabricationapproach simultaneously with the hBN encapsulation and the maximized localcavity field amplitude within the MoS$_2$ monolayer. We observe a non-monotonictemperature dependence of the cavity-trion interaction strength, consistentwith the non-local light-matter interactions in which the extent of thecenter-of-mass wavefunction is comparable to the cavity mode volume in space.Our approach can be generalized to other optically active 2D materials, openingthe way towards harnessing novel light-matter interaction regimes forapplications in quantum photonics.

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