Recent discoveries on Mott insulating and unconventional superconducting states in twisted bilayer graphene with Moiré superlattices have reshaped the landscape of ''twistronics'' and paved the way for developing high-temperature superconductors and new devices for quantum computing and sensing. Meanwhile, artificially structured photonic and phononic metamaterials/crystals (or meta-crystals) have become a fertile playground for emulating quantum-mechanical features of condensed matter systems, revealing new routes for robust control of classical waves. Drawing inspiration from the success of twisted bilayer graphene, this perspective casts an overarching framework of the emerging Moiré photonic and phononic meta-crystals that promise novel classical-wave devices. We begin with the fundamentals of Moiré superlattices, before highlighting recent works that exploit twist angle and interlayer coupling as new ingredients to engineer and tailor the band structures and effective material properties of photonic and phononic meta-crystals. We finally discuss future directions and promises of this emerging area in materials science and wave physics.
Photonics Initiative, Advanced Science Research Center, City University of New York（纽约市立大学高级科学研究中心光子学倡议）；Gulliver, CNRS, ESPCI Paris, Université PSL（巴黎高等物理化工国立学院CNRS Gulliver实验室）；Laboratory of Wave Engineering, EPFL（洛桑联邦理工学院波工程实验室）；Faculty of Mechanical Engineering, Technion–Israel Institute of Technology（以色列理工学院机械工程学院）；University of Chicago, James Franck Institute（芝加哥大学詹姆斯·弗兰克研究所）；University of Chicago, Kadanoff Center for Theoretical Physics（芝加哥大学卡达诺夫理论物理中心）；Walker Department of Mechanical Engineering, The University of Texas at Austin（德克萨斯大学奥斯汀分校沃克机械工程系）；Physics Program, Graduate Center, City University of New York（纽约市立大学研究生院物理学项目）
Reflector-Free, Highly Confined Love-Like SAWs Enabled by a Phononic Metasurface for Real-Time Monitoring of Cell Dynamics
Université de Lorraine（洛林大学）；CNRS（法国国家科学研究中心）；Centre national d’études spatiales (CNES)（法国国家空间研究中心）；Institut Universitaire de France (IUF)（法兰西学院）；Institut Interdisciplinaire d′Innovation Technologique (3IT), Université de Sherbrooke（舍布鲁克大学跨学科技术创新研究所）；Laboratoire Nanotechnologies Nanosystèmes (LN2)-IRL3463, CNRS, Université de Sherbrooke, INSA Lyon, École Centrale de Lyon, Université Grenoble Alpes（纳米技术与纳米系统实验室）
National Laboratory of Solid State Microstructures, Nanjing University（南京大学固体微结构物理国家重点实验室）；School of Advanced Manufacturing Engineering, Nanjing University（南京工程学院（注：原文为Nanjing University，但通常Suzhou校区对应苏州大学或南京大学苏州研究院，此处严格按原文翻译）南京大学先进制造工程学院）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences（中国科学院金属研究所沈阳材料科学国家研究中心）；New Cornerstone Science Laboratory, Department of Physics, The University of Hong Kong（香港大学新基石科学学院物理学系）；School of Physical Science and Technology, Soochow University（苏州大学物理科学与技术学院）；School of Physical Sciences, University of Science and Technology of China（中国科学技术大学物理学院）；School of Physics Science and Engineering, Tongji University（同济大学物理科学与工程学院）；Suzhou Institute for Advanced Research, University of Science and Technology of China（中国科学技术大学苏州高等研究院）；National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University（南京大学固体微结构物理国家重点实验室和材料科学与工程系）
