Research paperExperimental CharacterizationTheoreticalSuperluminal Correlations in Ensembles of Optical Phase SingularitiesT. Bucher, A. Gorlach, A. Niedermayr, Q. Yan et al.2025·10.1038/s41586-026-10209-z·arXiv:2509.17675AbstractPhase singularity ensembles in optical wavefields are investigated using ultrafast electron microscopy and phase-resolved near-field imaging. The work measures spatiotemporal dynamics, velocity distributions, and joint distance-velocity correlations of singularities in hyperbolic phonon-polariton wavepackets in hexagonal boron nitride, revealing transient superluminal motion and sub-cycle annihilation events.Read more
Thin hexagonal boron nitride flake used as the hyperbolic phonon-polariton platform for ultrafast phase-singularity imaging.2 characterizations6 properties1 figureExperimentalhBNStudied MaterialExpand
Reference sample used in the electron-microscopy interferometric scheme for electron pre-modulation.No measurements recordedhBNStudied MaterialExpand
Research paperExperimental CharacterizationTheoreticalSuperluminal Correlations in Ensembles of Optical Phase SingularitiesT. Bucher, A. Gorlach, A. Niedermayr, Q. Yan et al.2025·10.1038/s41586-026-10209-z·arXiv:2509.17675AbstractPhase singularity ensembles in optical wavefields are investigated using ultrafast electron microscopy and phase-resolved near-field imaging. The work measures spatiotemporal dynamics, velocity distributions, and joint distance-velocity correlations of singularities in hyperbolic phonon-polariton wavepackets in hexagonal boron nitride, revealing transient superluminal motion and sub-cycle annihilation events.Read more
Thin hexagonal boron nitride flake used as the hyperbolic phonon-polariton platform for ultrafast phase-singularity imaging.2 characterizations6 properties1 figureExperimentalhBNStudied MaterialExpand
Reference sample used in the electron-microscopy interferometric scheme for electron pre-modulation.No measurements recordedhBNStudied MaterialExpand
Research paperExperimental CharacterizationTheoreticalSuperluminal Correlations in Ensembles of Optical Phase SingularitiesT. Bucher, A. Gorlach, A. Niedermayr, Q. Yan et al.2025·10.1038/s41586-026-10209-z·arXiv:2509.17675AbstractPhase singularity ensembles in optical wavefields are investigated using ultrafast electron microscopy and phase-resolved near-field imaging. The work measures spatiotemporal dynamics, velocity distributions, and joint distance-velocity correlations of singularities in hyperbolic phonon-polariton wavepackets in hexagonal boron nitride, revealing transient superluminal motion and sub-cycle annihilation events.Read more
Thin hexagonal boron nitride flake used as the hyperbolic phonon-polariton platform for ultrafast phase-singularity imaging.2 characterizations6 properties1 figureExperimentalhBNStudied MaterialExpand
Reference sample used in the electron-microscopy interferometric scheme for electron pre-modulation.No measurements recordedhBNStudied MaterialExpand
Research paperExperimental CharacterizationTheoreticalSuperluminal Correlations in Ensembles of Optical Phase SingularitiesT. Bucher, A. Gorlach, A. Niedermayr, Q. Yan et al.2025·10.1038/s41586-026-10209-z·arXiv:2509.17675AbstractPhase singularity ensembles in optical wavefields are investigated using ultrafast electron microscopy and phase-resolved near-field imaging. The work measures spatiotemporal dynamics, velocity distributions, and joint distance-velocity correlations of singularities in hyperbolic phonon-polariton wavepackets in hexagonal boron nitride, revealing transient superluminal motion and sub-cycle annihilation events.Read more
Thin hexagonal boron nitride flake used as the hyperbolic phonon-polariton platform for ultrafast phase-singularity imaging.2 characterizations6 properties1 figureExperimentalhBNStudied MaterialExpand
Reference sample used in the electron-microscopy interferometric scheme for electron pre-modulation.No measurements recordedhBNStudied MaterialExpand
