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arXiv · 2507.11983

Berry Monopole Scattering in the Synthetic Momentum Space of a Bilayer Photonic Crystal Slab

Ngoc Duc Le·D. -H. -Minh Nguyen·Dung Xuan Nguyen·Hai Son Nguyen·Dario Bercioux
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Abstract

Berry monopoles-quantized sources of Berry curvature-are fundamental to topological phases, yet their scattering remains unexplored. Here, we report for the first time the adiabatic scattering of Berry monopoles in a bilayer photonic crystal slab combining one genuine and one synthetic momentum. Two monopoles approach, collide, and scatter within this hybrid parameter space. The process is described by an effective coupled-mode model and confirmed by full-wave simulations. We further propose an experimental scheme using chiral edge states, opening a route to probe monopole interactions in synthetic photonic systems.

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Ngoc Duc Le, D. -H. -Minh Nguyen, Dung Xuan Nguyen, Hai Son Nguyen, Dario Bercioux. 2025-07-16. Berry Monopole Scattering in the Synthetic Momentum Space of a Bilayer Photonic Crystal Slab. https://arxiv.org/abs/2507.11983

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