Pump-probe delay in a Ge-integrated non-Hermitian metasurface achieves ~0.5 ps eigenmode switching and full EP encirclement in ~2 ps with >99% modulation depth and Petermann factor ~10^3.
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2026 1verdicts
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Active Control of Topological Exceptional Points in Non-Hermitian Metasurfaces
Pump-probe delay in a Ge-integrated non-Hermitian metasurface achieves ~0.5 ps eigenmode switching and full EP encirclement in ~2 ps with >99% modulation depth and Petermann factor ~10^3.