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Floquet Ladder Lattice of Gain-Driven Polaritons
1University of Manitoba, Department of Physics and Astronomy, Winnipeg, Manitoba R3T 2N2, Canada.
Abstract:
A Floquet ladder lattice (FLL) is created by introducing ultrastrong temporal modulation into a gain-embedded cavity magnonics platform. In contrast to conventional atomic lattices, the FLL is a synthetic polariton lattice manifested in the frequency dimension, embodying light-matter interaction, temporal diffraction, and gain-driven nonequilibrium dynamics. Distinct lattice phenomena-including bistability-enabled exfoliation, edge singularities, compact edge localization, and Floquet band gaps-are experimentally observed and theoretically analyzed. Benefiting from its highly flexible lattice architecture, the FLL enables a superior microwave frequency comb with on-demand engineering capabilities.
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