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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…
physics.optics2023★ 5 cited
Non-Hermitian guided modes and exceptional points using loss-free negative-index materials
Li-Ting Wu, Xin-Zhe Zhang, Ru-Zhi Luo +1
We analyze the guided modes in coupled waveguides made of negative-index materials without gain or loss. We show that it supports non-Hermitian phenomenon on the existence of guide…