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    Exception point induced flat-band and waveguide laser

    In order to study the exceptional point (EP) properties in the photonic crystal waveguide, we construct the two-dimensional photonic crystal waveguide with the parity–time symmetry configuration. With the calc...

    **ao-xue Li, Er-pan Fan, Zhang-xin Wang, Yun-Tuan Fang in Optical and Quantum Electronics (2020)