近日，西南交通大学的贾文志及其研究团队取得一项新进展。经过不懈努力，他们利用包含原子聚合物阵列的波导量子电动力学结构构建光子带隙。相关研究成果已于2024年11月26日在国际知名学术期刊《物理评论A》上发表。

该研究团队研究了在包含周期性排列的原子聚合物的波导量子电动力学系统中，光子带隙的产生和调控。首先，研究人员考虑了一个与波导耦合的二聚体阵列的配置。

结果表明，如果正确设计胞内和胞间的相位延迟，那么通过调整胞内耦合强度，可以修改带隙的中心和宽度，以及通带的色散关系。这些操纵手段为控制波导中的传播模式提供了途径，从而实现了一些有趣的效果，如减缓甚至停止单光子脉冲。

最后，研究人员以四聚体链为例，展示了在每个晶胞中原子数量较多的情况下，可以实现可调谐的多带隙结构和更复杂的带隙工程。这一方案为微纳米量子系统中的光子带隙工程提供了有效的方法，可能有助于未来量子网络中光子传输的操纵。

附：英文原文

Title: Engineering photonic band gaps with a waveguide-QED structure containing an atom-polymer array

Author: M. S. Wang, W. Z. Jia

Issue&Volume: 2024/11/26

Abstract: We investigate the generation and engineering of photonic band gaps in waveguide quantum electrodynamics systems containing periodically arranged atom polymers. We first consider the configuration of a dimer array coupled to a waveguide. The results show that if the intra- and intercell phase delays are properly designed, the center and the width of the band gaps, as well as the dispersion relation of the passbands, can be modified by adjusting the intracell coupling strength. These manipulations provide ways to control the propagating modes in the waveguide, leading to some interesting effects such as slowing or even stopping a single-photon pulse. Finally, we take the case of the tetramer chain as an example to show that, in the case of a larger number of atoms in each unit cell, tunable multigap structures and more sophisticated band-gap engineering can be realized. Our proposal provides efficient ways for photonic band-gap engineering in micro- and nanoquantum systems, which may facilitate the manipulation of photon transport in future quantum networks.

DOI: 10.1103/PhysRevA.110.053716

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.053716