most citedRevisit the Poynting vector in PT-symmetric coupled waveguides

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physics.class-ph2023

Higher-order exceptional points in loss-free waveguide arrays with negative-index materials

Xin-Zhe Zhang, Li-Ting Wu, Ru-Zhi Luo +1

Negative-index materials (NIMs) are shown to support optical anti-parity-time (anti-PT) symmetry even when they are lossless. Here we prove the feasibility in achieving higher-orde…