发表机构
University of Delaware; National Institute for Materials Science (NIMS)（特拉华大学; 国家物质材料研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出对称工程策略，通过纳米脊阵列施加各向异性应变，在六方氮化硼的硼空位系综中恢复集体光学各向异性，实现与晶体取向无关的确定性偏振对齐，为偏振定义的系综自旋读出和光子集成奠定基础。
AI 中文摘要
光学偏振是量子光子学和传感技术中的一个关键自由度，能够实现高效的光与物质耦合和定向发射。然而，在基于缺陷系综的量子系统中，众多缺陷之间的取向平均会抑制光学各向异性，并消除确定性的偏振轴。在此，我们引入对称工程作为一种策略，以恢复六方氮化硼（h-BN）中带负电的硼空位（V_B^-）系综的集体光学各向异性。通过光刻定义的纳米脊阵列施加各向异性的面内拉伸应变，面内对称性被打破，系综发射偶极子与脊定义的应变对称轴对齐。偏振分辨的光致发光显示，偏振可见度随应变各向异性的幅度而缩放，而发射方向在不同应变方向的器件中严格遵循工程化的对称轴。这种确定性对齐与晶体取向无关，为二维量子材料中偏振定义的系综自旋读出和可编程光子集成奠定了光学基础。
英文摘要
Optical polarization is a key degree of freedom in quantum photonic and sensing technologies, enabling efficient light--matter coupling and directional emission. However, in defect ensemble-based quantum systems, orientational averaging across many defects suppresses optical anisotropy and eliminates a deterministic polarization axis. Here, symmetry engineering is introduced as a strategy to restore collective optical anisotropy in negatively charged boron vacancy (V_B^-) ensembles hosted in hexagonal boron nitride (h-BN). By imposing anisotropic in-plane tensile strain through lithographically defined nano-ridge arrays, in-plane symmetry is broken and the ensemble emission dipole is aligned with the ridge-defined strain symmetry axis. Polarization-resolved photoluminescence reveals that the polarization visibility scales with the magnitude of strain anisotropy, while the emission orientation rigidly follows the engineered symmetry axis across devices with varying strain direction. This deterministic alignment is independent of crystal orientation, establishing the optical foundation for polarization-defined ensemble spin readout and programmable photonic integration in two-dimensional quantum materials
