Oudich Mourad, Kong Xianghong, Zhang Tan, Qiu Chengwei, Jing Yun
Graduate Program in Acoustics, Penn State University, University Park, PA, USA.
Institut Jean Lamour, CNRS, Université de Lorraine, Nancy, France.
Nat Mater. 2024 Sep;23(9):1169-1178. doi: 10.1038/s41563-024-01950-9. Epub 2024 Aug 30.
Recent discoveries of Mott insulating and unconventional superconducting states in twisted bilayer graphene with moiré superlattices have not only reshaped the landscape of 'twistronics' but also sparked the rapidly growing fields of moiré photonic and phononic structures. These innovative moiré structures have opened new routes of exploration for classical wave physics, leading to intriguing phenomena and robust control of electromagnetic and mechanical waves. Drawing inspiration from the success of twisted bilayer graphene, this Perspective describes an overarching framework of the emerging moiré photonic and phononic structures that promise novel classical wave devices. We begin with the fundamentals of moiré superlattices, before highlighting recent studies that exploit twist angle and interlayer coupling as new ingredients with which to engineer and tailor the band structures and effective material properties of photonic and phononic structures. Finally, we discuss the future directions and prospects of this emerging area in materials science and wave physics.
近期在具有莫尔超晶格的扭曲双层石墨烯中发现的莫特绝缘态和非常规超导态，不仅重塑了“扭曲电子学”的格局，还催生了迅速发展的莫尔光子和声子结构领域。这些创新的莫尔结构为经典波物理学开辟了新的探索途径，带来了引人入胜的现象以及对电磁波和机械波的强大控制。受扭曲双层石墨烯成功的启发，本观点文章描述了新兴的莫尔光子和声子结构的总体框架，这些结构有望实现新型经典波器件。我们首先介绍莫尔超晶格的基本原理，然后重点介绍近期的研究，这些研究利用扭曲角和层间耦合作为新要素来设计和调整光子和声子结构的能带结构及有效材料特性。最后，我们讨论了这个材料科学和波物理学新兴领域的未来方向和前景。
