Electromagnetically induced moiré optical lattices in a coherent atomic gas

doi:10.1007/s11467-022-1153-6

Frontiers of Physics

2022, Vol. 17

Issue (4): 42508 https://doi.org/10.1007/s11467-022-1153-6

本期目录

Electromagnetically induced moiré optical lattices in a coherent atomic gas

Zhiming Chen^1,^2,³, Xiuye Liu^1,⁴, Jianhua Zeng^1,⁴(

)

¹. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an 710119, China
². School of Science, East China University of Technology, Nanchang 330013, China
³. Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
⁴. University of Chinese Academy of Sciences, Beijing 100049, China

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Abstract：

Electromagnetically induced optical (or photonic) lattices via atomic coherence in atomic ensembles have recently received great theoretical and experimental interest. We here conceive a way to generate electromagnetically induced moiré optical lattices — a twisted periodic pattern when two identical periodic patterns (lattices) are overlapped in a twisted angle (θ) — in a three-level coherent atomic gas working under electromagnetically induced transparency. We show that, changing the twisted angle and relative strength between the two constitutive sublattices, the moiré Bloch bands that are extremely flattened can always appear, resembling the typical flat-band and moiré physics found in other contexts. Dynamics of light propagation in the induced periodic structures demonstrating the unique linear localization and delocalization properties are also revealed. Our scheme can be implemented in a Rubidium atomic medium, where the predicted moiré optical lattices and flattened bands are naturally observable.

Key words： electromagnetically induced transparency moiré optical lattices extremely flat bands light propagation coherent atomic gas

收稿日期: 2021-11-21 出版日期: 2022-03-03

Corresponding Author(s): Jianhua Zeng

引用本文:

. [J]. Frontiers of Physics, 2022, 17(4): 42508.
Zhiming Chen, Xiuye Liu, Jianhua Zeng. Electromagnetically induced moiré optical lattices in a coherent atomic gas. Front. Phys. , 2022, 17(4): 42508.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-022-1153-6
https://academic.hep.com.cn/fop/CN/Y2022/V17/I4/42508

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