ArticleLight, science & applications2018
Superluminal X-waves in a polariton quantum fluid.
Article in Light, science & applications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
6 citing papers in PubMed.
- Polaritonic quantum matter.Nanophotonics (Berlin, Germany) · 2025Review
- Ultrafast imaging of polariton propagation and interactions.Nature communications · 2023Article
- Topologically driven Rabi-oscillating interference dislocation.Nanophotonics (Berlin, Germany) · 2022Article
- Spatiotemporal continuum generation in polariton waveguides.Light, science & applications · 2019Article
- Room temperature long-range coherent exciton polariton condensate flow in lead halide perovskites.Science advances · 2018Article
- Interactions and scattering of quantum vortices in a polariton fluid.Nature communications · 2018Article
Corrections and comments
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Authors and funding
9 authors.
Funding
Abstract
In this work, we experimentally demonstrate for the first time the spontaneous generation of two-dimensional exciton-polariton X-waves. X-waves belong to the family of localized packets that can sustain their shape without spreading, even in the linear regime. This allows the wavepacket to maintain its shape and size for very low densities and very long times compared to soliton waves, which always necessitate a nonlinearity to compensate the diffusion. Here, we exploit the polariton nonlinearity and uniquely structured dispersion, comprising both positive- and negative-mass curvatures, to trigger an asymmetric four-wave mixing in momentum space. This ultimately enables the self-formation of a spatial X-wave front. Using ultrafast imaging experiments, we observe the early reshaping of the initial Gaussian packet into the X-pulse and its propagation, even for vanishingly small densities. This allows us to outline the crucial effects and parameters that drive the phenomena and to tune the degree of superluminal propagation, which we found to be in close agreement with numerical simulations.
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Registered trials
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