近日，新加坡南洋理工大学的Weibo Gao及其研究团队取得一项新进展。经过不懈努力，他们对用于量子纠缠光子产生的范德华工程进行研究。相关研究成果已于2024年10月14日在国际知名学术期刊《自然—光子学》上发表。

本文报道了通过二维材料的范德华工程产生量子纠缠光子对的研究。研究人员将两个范德华薄层垂直对齐，通过两个薄片中双光子发射的干涉产生偏振纠缠光子对。

偏振纠缠态的保真度测得高达86±0.7%。范德华工程与片上光子学的兼容性为在亚波长尺度上集成纠缠光子源开辟了新的可能性。

据悉，范德华工程是调整材料特性和设计激子器件的一种强大工具。

附：英文原文

Title: Van der Waals engineering for quantum-entangled photon generation

Author: Kallioniemi, Leevi, Lyu, Xiaodan, He, Ruihua, Rasmita, Abdullah, Duan, Ruihuan, Liu, Zheng, Gao, Weibo

Issue&Volume: 2024-10-14

Abstract: Van der Waals engineering serves as a powerful tool to tailor material properties and design excitonic devices. Here we report quantum-entangled photon pair generation through van der Waals engineering with two-dimensional materials. We align two van der Waals thin layers perpendicular to each other, yielding polarization-entangled photon pairs through the interference of biphoton emission in the two flakes. The polarization-entangled state is measured with a fidelity up to 86±0.7%. The compatibility of van der Waals engineering with on-chip photonics opens new possibilities for entangled photon source integration at the subwavelength scale.

DOI: 10.1038/s41566-024-01545-5

Source: https://www.nature.com/articles/s41566-024-01545-5