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- W4383313879 abstract "Non-Hermitian systems with complex-valued energy spectra provide an extraordinary platform for manipulating unconventional dynamics of light. Here, we demonstrate the localization of light in an instantaneously reconfigurable non-Hermitian honeycomb photonic lattice that is established in a coherently prepared atomic system. One set of the sublattices is optically modulated to introduce the absorptive difference between neighboring lattice sites, where the Dirac points in reciprocal space are extended into dispersionless local flat bands, with two shared eigenstates: low-loss (high-loss) one with fields confined at sublattice B (A). When these local flat bands are broad enough due to larger loss difference, the incident beam with its tangential wave vector being at the K point in reciprocal space is effectively localized at sublattice B with weaker absorption, namely, the commonly seen power exchange between adjacent channels in photonic lattices is effectively prohibited. The current work unlocks a new capability from non-Hermitian two-dimensional photonic lattices and provides an alternative route for engineering tunable local flat bands in photonic structures." @default.
- W4383313879 created "2023-07-07" @default.
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- W4383313879 date "2023-07-06" @default.
- W4383313879 modified "2023-10-14" @default.
- W4383313879 title "Loss Difference Induced Localization in a Non-Hermitian Honeycomb Photonic Lattice" @default.
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- W4383313879 doi "https://doi.org/10.1103/physrevlett.131.013802" @default.
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