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

TL;DR

This paper demonstrates how dual-species atom arrays can be engineered to achieve polarization-selective quantum optical responses, enabling scalable, reconfigurable quantum light modulation beyond the limitations of single-species arrays.

Contribution

It introduces a novel dual-species atom array design that breaks in-plane symmetry to enable polarization-dependent subradiant modes for quantum light control.

Findings

Achieved polarization-dependent subradiant modes in dual-species arrays

Demonstrated a scalable polarization-selective quantum light modulator

Established a reconfigurable atomic-photonic platform for quantum optics

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.