Qingjie Liu

Oct 31, 2024 | mdpi.com | Zhihong Wu |Zhe Dong |Kun Yang |Qingjie Liu

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Jul 27, 2023 | opg.optica.org | Shaolin Ke |Tiantian Wang |Qingjie Liu |Dong Zhao

AbstractThe topology of exceptional points (EPs) has been revealed by taking stationary or dynamical encircling around them, which induces eigenstate exchange or chiral mode conversion. However, the conversions are usually reciprocal obeying restricted transmittances. Here we propose the concept of nonreciprocal encircling of EPs in a dynamic waveguide under complex modulation.