2024
DOI: 10.1088/1367-2630/ad5a31
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Chirality-enabled topological phase transitions in parity-time symmetric systems

Yong Cao,
Lijuan Sheng,
Qiang Zhou
et al.

Abstract: Photonic spin Hall effect (PSHE) in chiral PT-symmetric systems exhibits many exotic features, but the underlying physical mechanism has not been well elucidated. Here, through rigorous calculations based on full-wave theory, we reveal the physical mechanism of the exotic PSHE and identify a chirality-enabled topological phase transition. When circularly polarized light is incident on a chiral PT-symmetric system, the transmitted beam contains two components: a spin-flipped abnormal mode that acquires a geomet… Show more

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