Twisted Quadrupole Topological Photonic Crystals

• Published in: Laser & photonics reviews Vol. 14; no. 8
• Main Authors: Zhou, Xiaoxi, Lin, Zhi‐Kang, Lu, Weixin, Lai, Yun, Hou, Bo, Jiang, Jian‐Hua
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.08.2020
• Subjects: Crystal lattices; Heterostructures; higher‐order topology; Metamaterials; Photonic crystals; Polaritons; quadrupole topology; Quadrupoles; Topological insulators; topological photonics; Topology; Twisting

Topological manipulation of waves is at the heart of cutting‐edge metamaterial research. Quadrupole topological insulators were recently discovered in 2D flux‐threading lattices that exhibit higher‐order topological wave trapping at both the edges and corners. Photonic crystals (PhCs), lying at the...