Bosonic condensation of exciton-polaritons in an atomically thin crystal
arXiv:2009.11885 · doi:10.1038/s41563-021-01000-8
Abstract
The emergence of two-dimensional crystals has revolutionized modern solid-state physics. From a fundamental point of view, the enhancement of charge carrier correlations has sparked enormous research activities in the transport- and quantum optics communities. One of the most intriguing effects, in this regard, is the bosonic condensation and spontaneous coherence of many-particle complexes. Here, we find compelling evidence of bosonic condensation of exciton-polaritons emerging from an atomically thin crystal of MoSe2 embedded in a dielectric microcavity under optical pumping. The formation of the condensate manifests itself in a sudden increase of luminescence intensity in a threshold-like manner, and a significant spin-polarizability in an externally applied magnetic field. Spatial coherence is mapped out via highly resolved real-space interferometry, revealing a spatially extended condensate. Our device represents a decisive step towards the implementation of coherent light-sources based on atomically thin crystals, as well as non-linear, valleytronic coherent devices.
Main text: 11 pages, 5 figures, Supplementary Materials: 4 pages, 5 figures
References in corpus (5)
- Quantum fluids of light
- Strong light-matter coupling in two-dimensional atomic crystals
- Evidence of high-temperature exciton condensation in 2D atomic double layers
- Enhanced nonlinear interaction of polaritons via excitonic Rydberg states in monolayer WSe2
- Nonlinear relaxation of 0-dimension-trapped microcavity polaritons
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