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arXiv · 2602.23237

Polarization-selective quantum cooperative response in dual-species atom arrays

Huan Wang·Shangguo Zhu·Yun Long·Fei Zhang·Yinghui Guo·Mingbo Pu·Xiangang Luo
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Abstract

Atom arrays have emerged as a powerful platform for quantum light-matter interfaces, yet single-species arrays are constrained by in-plane symmetry, restricting polarization control. Here we investigate the cooperative optical response of dual-species subwavelength atom arrays, in which intrinsic polarizability difference breaks in-plane symmetry. By engineering the lattice constants and detunings, the arrays exhibit polarization-dependent subradiant modes, enabling complete reflection of a specific polarization component. Leveraging this mechanism, we assemble array units as functional pixels and demonstrate a scalable polarization-selective quantum light modulator. Our work establishes a dynamically reconfigurable atomic-photonic platform for versatile subwavelength quantum optical elements.

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Huan Wang, Shangguo Zhu, Yun Long, Fei Zhang, Yinghui Guo, Mingbo Pu, Xiangang Luo. 2026-02-26. Polarization-selective quantum cooperative response in dual-species atom arrays. https://arxiv.org/abs/2602.23237

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