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arXiv · 2102.13285

Interaction induced bi-skin effect in an exciton-polariton system

Xingran Xu·Huawen Xu·S. Mandal·R. Banerjee·Sanjib Ghosh·T. C. H. Liew
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Abstract

The non-Hermitian skin effect can be realized through asymmetric hopping between forward and backward directions, where all the modes of the system are localized at one edge of a finite 1D lattice. However, achieving such an asymmetric hopping in optical systems is far from trivial. Here we show theoretically that in a finite chain of 1D exciton-polariton micropillars with symmetric hopping, the inherent non-linearity of the system can exhibit a bi-skin effect, where the modes of the system are localized at the two edges of the system. To show the topological origin of such modes, we calculate the winding number.

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Xingran Xu, Huawen Xu, S. Mandal, R. Banerjee, Sanjib Ghosh, T. C. H. Liew. 2021-02-26. Interaction induced bi-skin effect in an exciton-polariton system. https://doi.org/10.1103/physrevb.103.235306

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