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Nonlinear Non-Hermitian Skin Effect and Skin Solitons in Temporal Photonic Feedforward Lattices

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arxiv 2409.19693 v2 pith:PXRILQPS submitted 2024-09-29 physics.optics

classification physics.optics
keywords nonlinearskinkerrnhseboundaryeffectfeedforwardnon-hermitian
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Here we report the experimental demonstration of the nonlinear non-Hermitian skin effect (NHSE) in an effective Kerr nonlinear temporal photonic lattice, where the high-power requirements and lack of tunability intrinsic to optical materials are overcome by an artificial nonlinearity arising from optoelectronic feedforward. Thanks to Kerr self-trapping, the nonlinear NHSE is demonstrated to possess much better localization strength and robustness at the preferred boundary compared to the linear case. Away from the preferred boundary, Kerr self-trapping can even inhibit NHSE-induced transport and form stable skin solitons. Harnessing the nonlinearity-controlled NHSE, we judiciously design an optical router with a flexibly tuned output port. Our findings promise great applications in robust signal transmission, routing, and processing.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Subskin modes in a nonlinear non-Hermitian system

    physics.optics 2025-05 conditional novelty 6.0 of 10

    In a nonlinear non-Hermitian lattice, subskin modes localized below the edge can form without the strict coupling constraints required in linear systems, while deeper subskin modes still require fine-tuning.

  2. Observation of localization reversal and harmonic generation in nonlinear non-Hermitian skin effect

    cond-mat.mes-hall 2025-05 conditional novelty 6.0 of 10

    In a nonlinear Hatano-Nelson model and a microwave metamaterial, increasing the field intensity reverses the non-Hermitian skin effect, switching the edge localization from one end of the lattice to the other, and the...

  3. Nonlinear skin modes and fixed points

    nlin.PS 2024-11 conditional novelty 6.0 of 10

    In nonlinear non-Hermitian lattices, open-boundary skin-mode energies are no longer a subset of the semi-infinite spectrum, and coupling impurities create new localized modes and dark solitons.

  4. Complex Frequency Fingerprint: Basic Concept and Theory

    cond-mat.mes-hall 2024-11 conditional novelty 5.0 of 10

    A measured response matrix at one driving frequency is algebraically continued into the complex-frequency plane, yielding a fingerprint that identifies non-Hermitian skin modes and complex-energy quasiparticle peaks.

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