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Unstable and stable regimes of polariton condensation

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Baboux F., De Bernardis D., Goblot V., Gladilin V. N., Gomez C., Galopin E., Le Gratiet L., Lemaitre A., Sagnes I., Carusotto I., Wouters M., Amo A., Bloch J

Affiliazione Autori:  Univ Paris Saclay, Univ Paris Sud, CNRS, Ctr Nanosci & Nanotechnol,Marcoussis C2N, F-91460 Marcoussis, France; Univ Paris Diderot, Lab Mat & Phenomenes Quant, CNRS UMR 7162, F-75013 Paris, France; Univ Antwerp, TQC, Univ Pl 1, B-2610 Antwerp, Belgium; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy.; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; TU Wien, Atominst, Vienna Ctr Quantum Sci & Technol, A-1040 Vienna, Austria

Riassunto:  Modulational instabilities play a key role in a wide range of nonlinear optical phenomena, leading, e.g., to the formation of spatial and temporal solitons, rogue waves, and chaotic dynamics. Here, we experimentally demonstrate the existence of a modulational instability in condensates of cavity polaritons, quasi-particles arising from the strong coupling of cavity photons with quantum well excitons. For this purpose, we investigate the spatiotemporal coherence properties of polariton condensates in GaAs-based microcavities under continuous-wave pumping. The chaotic behavior of the instability results in a strongly reduced spatial and temporal coherence and a significantly inhomogeneous density. Additionally, we show how the instability can be tamed by introducing a periodic potential so that condensation occurs in negative mass states, leading to largely improved coherence and homogeneity. These results pave the way to the exploration of long-range order in dissipative quantum fluids of light within a controlled platform. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License

Rivista/Giornale:  OPTICA
Volume n.:  5 (10)      Pagine da: 1163  a: 1170
DOI: 10.1364/OPTICA.5.001163

   *Citazioni: 6
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  14/07/2019

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