Selective high-order topological states and tunable chiral emission in atomic metasurfaces

• URL: http://arxiv.org/abs/2510.08349v1
• Date: Thu, 09 Oct 2025 15:36:33 GMT
• Title: Selective high-order topological states and tunable chiral emission in atomic metasurfaces
• Authors: Yi-Xin Wang, Yan Zhang, Lei Du, Lingzhen Guo, Jin-Hui Wu,
• Abstract summary: We investigate the quantum optical and topological properties of a two-dimensional Kagome AM.<n>We reveal selective higher-order topological states with a unique dynamical chasing" behavior.<n>Our findings establish AMs as a versatile platform for engineering tunable topological states and chiral quantum optical phenomena.
• Score: 31.687588727584142
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Atomic metasurfaces (AMs) provide a powerful nanophotonic platform for integrating topological effects into quantum many-body systems. In this Letter, we investigate the quantum optical and topological properties of a two-dimensional Kagome AM, going beyond the tight-binding approximation and incorporating all-to-all interactions. We reveal selective higher-order topological states with a unique dynamical ``chasing" behavior, protected by a generalized chiral symmetry and enabling efficient topological directional transfer. By introducing an impurity atom -- a giant atom -- coupled to all array atoms, we observe chiral emission patterns strongly dependent on the atomic polarization. This nonlocal coupling structure allows exploration of self-interference effects at subwavelength scales. Our findings establish AMs as a versatile platform for engineering tunable topological states and chiral quantum optical phenomena, with potential applications in customized light sources and photonic devices.

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