2026-10-11T19:37:20Z https://api.figshare.com/v2/oai

oai:figshare.com:article/29888024 2026-10-01T16:00:18Z category_37476 portal_1023 item_type_12 month_year_10_2026

Chiral edge-state signatures of Berry monopole merging and splitting in a bilayer photonic crystal slab with synthetic momentum Ngoc Duc Le (22036220) D. -H. -Minh Nguyen (14363940) Dung Xuan Nguyen (14363946) Hai Son Nguyen (4178527) Dario Bercioux (14363949) Physics (arXiv) physics.optics (arXiv) cond-mat.mes-hall (arXiv) Berry monopoles are point degeneracies in parameter space where the Berry curvature emanates radially, analogous to magnetic monopoles. Here, we report the adiabatic merging and splitting of Berry monopoles in a bilayer photonic crystal slab combining one genuine and one synthetic momentum. Two monopoles approach, merge, and split within this hybrid parameter space. The process is described by an effective coupled-mode model and confirmed by full-wave simulations. We further propose a scheme to experimentally probe the Berry monopole merging and splitting by monitoring the evolution of chiral edge states localized at the interface between two topological phases with inverted band structures. 2026-09-29T00:00:00Z Text Preprint 10.48550/arXiv.2507.11983 https://figshare.com/articles/preprint/Berry_Monopole_Scattering_in_the_Synthetic_Momentum_Space_of_a_Bilayer_Photonic_Crystal_Slab/29888024 CC0