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Articles by Mudi Wang
Insulator-free topological photonic multi-lane highways
Abstract Topological protection in photonic structures enables robust unidirectional propagation immune to structural disorder1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. However, conventional implementations obtain this protection from topological-insulator domains whose interfaces host narrow guiding channels, leaving much of the insulating bulk inactive for transport. This imposes a fundamental trade-off between topological robustness and spatial footprint21,22,23,24,25.
Bulk–spatiotemporal vortex correspondence in gyromagnetic zero-index media - Nature
Abstract Photonic double-zero-index media, distinguished by concurrently zero-valued permittivity and permeability, exhibit extraordinary properties not found in nature1,2,3,4,5,6,7,8. Notably, the notion of zero index can be substantially expanded by generalizing the constitutive parameters from null scalars to non-reciprocal tensors with non-zero matrix elements but zero determinants9,10.
Unconventional bulk-Fermi-arc links paired third-order exceptional points splitting from a defective triple point - Communications Physics
Abstract Exceptional degeneracies, unique to open systems, are important in non-Hermitian topology. While bulk-Fermi-arcs connecting second-order exceptional points (EP2s) have been observed, the existence of bulk-Fermi-arcs linking higher-order exceptional points remains unexplored.
Three-dimensional nonreciprocal transport in photonic topological heterostructure of arbitrary shape
Research Article PHYSICS INTRODUCTION Topological materials have garnered notable attention from researchers due to their remarkable properties, in particular the unidirectional boundary transport (1–15), which makes them highly promising for applications such as optical communications, energy transport, and quantum computing.
Topological Photonic Alloy
synopsis Recipe for a One-Way Waveguide Published 30 May 2024 Experiments and numerical simulations indicate that randomly replacing a few nonmagnetic components with magnetic ones in a photonic alloy induces backscattering-free light propagation along its edge. See more in Physics Click to Expand Article Text (Subscription Required) Click to Expand Supplemental Material (Subscription Required) Click to Expand Click to Expand
Physical Review Letters
Volume 132, Issue 22 31 May 2024 On the Cover Fluorescence microscope image from a video showing the dynamics of active nematics confined to a cardioid along with the tracks of three defects, which form a braid. Selected for an Editors’ Suggestion. From the article: Controlling Chaos: Periodic Defect Braiding in Active Nematics Confined to a Cardioid Fereshteh L. Memarian, Derek Hammar, Md Mainul Hasan Sabbir, Mark Elias, Kevin A. Mitchell, and Linda S. Hirst Phys. Rev. Lett. 132, 228301 (2024)
Magnetically controllable multimode interference in topological photonic crystals - Light: Science & Applications
Abstract Topological photonic insulators show promise for applications in compact integrated photonic circuits due to their ability to transport light robustly through sharp bendings. The number of topological edge states relies on the difference between the bulk Chern numbers across the boundary, as dictated by the bulk edge correspondence.
Experimental realization of chiral Landau levels in two-dimensional Dirac cone systems with inhomogeneous effective mass - Light: Science & Applications
Abstract Chiral zeroth Landau levels are topologically protected bulk states. In particle physics and condensed matter physics, the chiral zeroth Landau level plays a significant role in breaking chiral symmetry and gives rise to the chiral anomaly. Previous experimental works on such chiral Landau levels are mainly based on three-dimensional Weyl degeneracies coupled with axial magnetic fields.
Observation of Non-Abelian Charged Nodes Linking Nonadjacent Gaps
Abstract Nodal links are special configurations of band degeneracies in the momentum space, where nodal line branches encircle each other. In PT symmetric systems, nodal lines can be topologically characterized using the eigenvector frame rotations along an encircling loop and the linking structure can be described with non-Abelian frame charges involving adjacent bands.
Parental exposure to TiO2 NPs promotes the multigenerational reproductive toxicity of Cd in Caenorhabditis elegans via bioaccumulation of Cd in germ cells
Parental exposure to TiO2 NPs promotes the multigenerational reproductive toxicity of Cd in Caenorhabditis elegans via bioaccumulation of Cd in germ cells Titanium dioxide nanoparticles (TiO2 NPs) can modify the behavior and bioavailability of heavy metals in aquatic environments. However, the influence of TiO2 NPs on the multigenerational impairments caused by heavy metals is largely unknown.
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