High-order topological charges up to ±3 are realized in C4-symmetric photonic crystal slabs via parameter-driven merging of off-Γ BICs using a unified geometric framework based on Fabry-Pérot interference and guided resonances.
Benea-Chelmus, S
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physics.optics 2years
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A non-Hermitian metastack with VO2 uses thermal hysteresis to tune topological interface states and path-dependent exceptional points, achieving reversible 8% spectral shifts and near-unity reflectance modulation.
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Unified Topological Dynamics of Merging Bound States in the Continuum for High-Order Topological Charges
High-order topological charges up to ±3 are realized in C4-symmetric photonic crystal slabs via parameter-driven merging of off-Γ BICs using a unified geometric framework based on Fabry-Pérot interference and guided resonances.
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Dynamic Topological Light Control in Reconfigurable Non-Hermitian Metastacks
A non-Hermitian metastack with VO2 uses thermal hysteresis to tune topological interface states and path-dependent exceptional points, achieving reversible 8% spectral shifts and near-unity reflectance modulation.