Abstract
In this paper, we designed a one-dimensional magneto-optic(MO) multilayer structure with the nonreciprocal transmission of dual-mode. The composite structure’s energy band and transmission properties are studied using transfer matrix theory. Two pairs of nonreciprocal dispersive curves corresponding to edge modes appear in the bandgap. When the gain and loss factors are introduced into the multilayer structure, tunable and nonreciprocal extraordinary transmission appears above PT thresholds. Significantly, the composite structure with small and unequal gain/loss factors induces abnormal transmission and keeps nonreciprocal frequencies stable. Such distinguishing properties in the composite system are attractive for applications, such as optical isolators and multichannel nonreciprocal optical devices.
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Zhang, X., Yu, G., Shen, Y. et al. Nonreciprocal propagation of adjustable multi-pair edge-states in one dimensional crystal. Opt Quant Electron 54, 841 (2022). https://doi.org/10.1007/s11082-022-04277-4
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DOI: https://doi.org/10.1007/s11082-022-04277-4