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- W4288952135 abstract "Gain and loss modulation are ubiquitous in nature. An exceptional point arises when both the eigenvectors and eigenvalues coalesce, which in a physical system can be achieved by engineering the gain and loss coefficients, leading to a wide variety of counter-intuitive phenomena. In this work we demonstrate the existence of an exceptional point in an exciton polariton condensate in a double-well potential. Remarkably, near the exceptional point, the polariton condensate localized in one potential well can be switched off by an additional optical excitation in the other well with very low (far below threshold) laser power which surprisingly induces additional loss into the system. Increasing the power of the additional laser leads to a situation in which gain dominates in both wells again, such that the polaritons re-condense with almost the same density in the two potential wells. Our results offer a simple way to optically manipulate the polariton lasing process in a double-well potential structure. Extending such configuration to complex potential well lattices offers exciting prospects to explore high-order exceptional points and non-Hermitian topological photonics in a non-equilibrium many-body system." @default.
- W4288952135 created "2022-07-31" @default.
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- W4288952135 date "2021-01-23" @default.
- W4288952135 modified "2023-09-23" @default.
- W4288952135 title "Switching off microcavity polariton condensate near the exceptional point" @default.
- W4288952135 doi "https://doi.org/10.48550/arxiv.2101.09478" @default.
- W4288952135 hasPublicationYear "2021" @default.
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