PT-symmetry in nonlinear twisted multi-core fibers
| Autor: | Victor A. Vysloukh, Fangwei Ye, Xiao Zhang, Milivoj R. Belic, Yaroslav V. Kartashov, Xianfeng Chen |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed matter physics Wave propagation business.industry FOS: Physical sciences Monotonic function Function (mathematics) Pattern Formation and Solitons (nlin.PS) 01 natural sciences Nonlinear Sciences - Pattern Formation and Solitons Atomic and Molecular Physics and Optics Symmetry (physics) 010309 optics Reduction (complexity) Nonlinear system Optics 0103 physical sciences Fiber 010306 general physics business Refractive index Optics (physics.optics) Physics - Optics |
| Popis: | We address propagation of light in nonlinear twisted multi-core fibers with alternating amplifying and absorbing cores that are arranged into the PT - symmetric structure. In this structure, the coupling strength between neighboring cores and global energy transport can be controlled not only by the nonlinearity strength, but also by gain and losses and by the fiber twisting rate. The threshold level of gain/losses, at which PT -symmetry breaking occurs, is a non-monotonic function of the fiber twisting rate and it can be reduced nearly to zero or, instead, notably increased just by changing this rate. Nonlinearity usually leads to the monotonic reduction of the symmetry breaking threshold in such fibers. 6 pages,5 figures, to appear in Optics Letters |
| Databáze: | OpenAIRE |
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