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 nonlocal nonlinear media. Here, we report that exciton-polariton super...
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| Main Authors: | , , , , , , , |
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| Format: | article |
| Language: | EN |
| Published: |
American Physical Society
2020
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| Subjects: | |
| Online Access: | https://doaj.org/article/ff520142cb924f7ca0faf4fba35d111e |
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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 nonlocal 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 that bind together 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. |
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