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physics.optics2026
Chiral lasing via broken parity-time symmetry in bound-state-in-the-continuum metasurfaces
Matthew Parry, Daria A. Smirnova, Andrey A. Sukhorukov +1
The paper proposes a planar metasurface design that uses spatial gain‑loss modulation to break parity‑time symmetry, enabling chiral lasing that emits nearly pure circularly polari…
physics.optics2024
Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces
Jinyong Ma, Tongmiao Fan, Tuomas Haggren +10
Tunable biphoton quantum entanglement generated from nonlinear processes is highly desirable for cutting-edge quantum technologies, yet its tunability is substantially constrained…