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Optical Pattern Formation in a Rydberg-Dressed Atomic Gas with Non-Hermitian Potentials
- Source :
- Photonics, Vol 9, Iss 11, p 856 (2022)
- Publication Year :
- 2022
- Publisher :
- MDPI AG, 2022.
-
Abstract
- Spontaneous pattern formation from a spatially homogeneous background of nonlinear systems driven out of equilibrium is a widespread phenomenon in nature. However, similar phenomena and their physical realization in nonlinear systems with external potentials of gain and loss remain a challenge. We propose a scheme to realize a new type of spatial pattern formation through the self-organization of laser light in a Rydberg-dressed atomic gas with self-defocusing Kerr nonlinearity as well as non-Hermitian optical potentials. We show that by a suitable design of control and assistant laser fields, non-Hermitian optical potentials with or without parity-time (PT) symmetry for the probe laser field can be created. We find that through the nonlocal Kerr nonlinearity contributed by the long-range atom–atom interaction, a constant-intensity wave (CIW) may undergo modulation instability and induce spontaneous symmetry breaking, resulting in the emergence of various self-organized optical structures, which can be actively manipulated by tuning the nonlocality degree of the Kerr nonlinearity and by designing the non-Hermitian optical potentials. The results reported here open a door for developing non-Hermitian nonlinear optics.
Details
- Language :
- English
- ISSN :
- 23046732
- Volume :
- 9
- Issue :
- 11
- Database :
- Directory of Open Access Journals
- Journal :
- Photonics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.9edd29a5114b43fda742602b9ca47f01
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/photonics9110856