Dark-soliton molecules in an exciton-polariton superfluid

The general theory of dark solitons relies on repulsive interactions and therefore predicts the impossibility to form dark-soliton bound states. One important exception to this prediction is the observation of bound solitons in non-local nonlinear media. Here, we report that exciton-polariton superf...

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Bibliographic Details
Published in:arXiv.org 2020-03
Main Authors: Maître, Anne, Lerario, Giovanni, Medeiros, Adrià, Ferdinand, Claude, Glorieux, Quentin, Giacobino, Elisabeth, Pigeon, Simon, Bramati, Alberto
Format: Article
Language:English
Subjects:
Excitons
Fluids
Polaritons
Solitary waves
Structural stability
Superfluidity
Online Access:Get full text
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Summary:The general theory of dark solitons relies on repulsive interactions and therefore predicts the impossibility to form dark-soliton bound states. One important exception to this prediction is the observation of bound solitons in non-local nonlinear media. Here, we report that exciton-polariton superfluids can also sustain dark-soliton molecules although the interactions are fully local. With a novel all optical technique, we create two dark solitons and bind them to each other to form an unconventional dark-soliton molecule. We demonstrate that the stability of this structure and the separation distance between two dark-solitons is tightly connected to the driven-dissipative nature of the polariton fluid.
ISSN:2331-8422
DOI:10.48550/arxiv.2001.10653