Cavity quantum electrodynamics with moiré photonic crystal nanocavity

IF 14.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2025-05-19 DOI:10.1038/s41467-025-59942-5

Sai Yan, Hancong Li, Jingnan Yang, Xiqing Chen, Hanqing Liu, Deyan Dai, Rui Zhu, Zhikai Ma, Shushu Shi, Longlong Yang, Yu Yuan, Wenshuo Dai, Danjie Dai, Bowen Fu, Zhanchun Zuo, Haiqiao Ni, Zhichuan Niu, Can Wang, Kuijuan Jin, Qihuang Gong, Xiulai Xu

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Abstract

Due to the existence of flatbands within the band structure, twisting photonics introduces a possibility to enhance the interaction between excitons in single QDs and cavity photons because of the extremely high quality factor (Q) in theory. In this work, we report a Purcell effect between single QDs and moiré photonic crystal nanocavities. The moiré photonic crystal nanocavities in a GaAs slab with QDs embedded are formed by twisting two layer photonic crystal structures with specific angles. High Q, low mode volume and large overlap between QDs and cavity mode field have been achieved by optimizing the filling ratio of the single-layer photonic crystal, with which a Q of fundamental modes about 2000 is experimentally demonstrated. A photoluminescence intensity enhancement of a factor about 8.4 is observed when a single QD is in resonance with a cavity mode, with a Purcell factor of about 3.0 confirmed through the lifetime measurement. This result shows the potential of moiré photonics to implement solid-state cavity quantum electrodynamics for future optical quantum information processing.

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光子晶体纳米腔的腔量子电动力学

由于带结构中存在平带，扭转光子理论中具有极高的质量因子(Q)，从而为增强单量子点中激子与腔光子之间的相互作用提供了可能。在这项工作中，我们报道了单量子点和光子晶体纳米腔之间的珀塞尔效应。在嵌入量子点的砷化镓板中，将两层光子晶体结构以特定角度扭曲形成了波纹光子晶体纳米空腔。通过优化单层光子晶体的填充比，实现了高Q、低模体积和大的量子点与腔模场重叠，实验证明了其基本模的Q约为2000。当单个量子点与空腔模式共振时，光致发光强度增强约为8.4倍，通过寿命测量证实了Purcell因子约为3.0倍。这一结果表明，在未来的光量子信息处理中，moir光子学在实现固态腔量子电动力学方面具有潜力。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.