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Acoustic Black Hole in a Stationary Hydrodynamic Flow of Microcavity Polaritons

    (anno 2015)

Autori:  Nguyen H. S., Gerace D., Carusotto I., Sanvitto D., Galopin E., Lemaitre A., Sagnes I., Bloch J., Amo A

Affiliazione Autori:  CNRS, LPN, Lab Photon & Nanostruct, F-91460 Marcoussis, France; Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; CNR, Ist Nanosci, NNL, I-73100 Lecce, Italy

Riassunto:  We report an experimental study of superfluid hydrodynamic effects in a one-dimensional polariton fluid flowing along a laterally patterned semiconductor microcavity and hitting a micron-sized engineered defect. At high excitation power, superfluid propagation effects are observed in the polariton dynamics; in particular, a sharp acoustic horizon is formed at the defect position, separating regions of sub- and supersonic flow. Our experimental findings are quantitatively reproduced by theoretical calculations based on a generalized Gross-Pitaevskii equation. Promising perspectives to observe Hawking radiation via photon correlation measurements are illustrated.

Volume n.:  114 (3)      Pagine da: 036402-1  a: 036402-4
Parole chiave: Hawking radiation - analog - condensate - solitons
DOI: 10.1103/PhysRevLett.114.036402

*Impact Factor della Rivista: (2015) 7.645   *Citazioni: 28
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  18/09/2017

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