arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.11275physics.optics
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相干原子气体中的电磁感应莫尔光晶格

Electromagnetically induced moiré optical lattices in a coherent atomic gas

Zhiming Chen, Xiuye Liu, Jianhua Zeng

摘要:

原子系综中利用原子相干性的电磁诱导光(或光子)晶格近年来受到了理论和实验的极大关注。我们在这里设想了一种方法来产生电磁感应莫尔光晶格-扭曲的周期图案时,两个相同的周期图案(晶格)重叠在一个扭曲的角度($θ$)-在一个三能级相干原子气体工作在电磁感应透明。我们表明,改变两个本构子晶格之间的扭曲角和相对强度,莫尔布洛赫带是非常平坦的总是可以出现,类似于典型的平带和莫尔物理在其他情况下发现。光在诱导周期性结构中的传播动力学也被揭示,表现出独特的线性局域化和离域特性。我们的方案可以在铷原子介质中实现,其中预测的莫尔光晶格和平坦带是自然观察到的。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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