Abstract
Engineering strong interactions between optical photons is a challenge for quantum science. Polaritonics, which is based on the strong coupling of photons to atomic or electronic excitations in an optical resonator, has emerged as a promising approach to address this challenge, paving the way for applications such as photonic gates for quantum information processing and photonic quantum materials for the investigation of strongly correlated driven–dissipative systems. Recent experiments have demonstrated the onset of quantum correlations in exciton-polariton systems, showing that strong polariton blockade—the prevention of resonant injection of additional polaritons in a well delimited region by the presence of a single polariton—could be achieved if interactions were an order of magnitude stronger. Here we report time-resolved four-wave-mixing experiments on a two-dimensional electron system embedded in an optical cavity, demonstrating that polariton–polariton interactions are strongly enhanced when the electrons are initially in the fractional quantum Hall regime. Our experiments indicate that, in addition to strong correlations in the electronic ground state, exciton–electron interactions leading to the formation of polaron-polaritons have a key role in enhancing the nonlinear optical response of the system. Our findings could facilitate the realization of strongly interacting photonic systems, and suggest that nonlinear optical measurements could provide information about fractional quantum Hall states that is not accessible through their linear optical response. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000352116Publication status
publishedExternal links
Journal / series
NatureVolume
Pages / Article No.
Publisher
NatureOrganisational unit
03636 - Imamoglu, Atac / Imamoglu, Atac
03833 - Wegscheider, Werner / Wegscheider, Werner
Funding
671000 - Interacting polaritons in two-dimensional electron systems (EC)
Related publications and datasets
Is supplemented by: https://doi.org/10.3929/ethz-b-000338463
Notes
671000 POLTDES, SNF NCCR Quantum Science and Technology - project 3, ETH Fellowship S.R.
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.More
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