Acoustic Black Hole in a Stationary Hydrodynamic Flow of Microcavity Polaritons
Authors: Nguyen H. S., Gerace D., Carusotto I., Sanvitto D., Galopin E., Lemaitre A., Sagnes I., Bloch J., Amo A.
Autors Affiliation: 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
Abstract: 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.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 114 (3) Pages from: 036402-1 to: 036402-4
KeyWords: Hawking radiation; analog; condensate; solitons; DOI: 10.1103/PhysRevLett.114.036402Citations: 68data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-10-18References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here