Department of Materials Science and Engineering ARC Centre of Excellence in Future Low‐Energy Electronics Technologies (FLEET), Monash University Clayton Victoria Australia
Qingdong Ou
Department of Materials Science and Engineering ARC Centre of Excellence in Future Low‐Energy Electronics Technologies (FLEET), Monash University Clayton Victoria Australia
Yemin Dong
State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences Shanghai China
Huanyang Chen
School of Electronic Science and Engineering, Xiamen University Xiamen Fujian Province China
Peining Li
Wuhan National Laboratory for Optoelectronics
Xinliang Zhang
Wuhan National Laboratory for Optoelectronics
Yuerui Lu
Research School of Electrical, Energy and Materials Engineering, the Australian National University, Canberra Australian Capital Territory Australia
Qiaoliang Bao
Department of Materials Science and Engineering ARC Centre of Excellence in Future Low‐Energy Electronics Technologies (FLEET), Monash University Clayton Victoria Australia
Abstract Polaritons in two‐dimensional (2D) materials continues to garner significant attention due to their favorable ability of field‐confinement and intriguing potential for low‐loss and ultrafast optical and photonic devices. The recent experimental observation of in‐plane anisotropic dispersion in natural van der Waals materials has revealed much richer physics as compared to isotropic plasmonic materials, which provides new insight to manipulate the polaritons and manufacture flat optical devices with unprecedented controls. Herein, we give an overview of the recent progress in in‐plane anisotropic polaritons launched and visualized in the near‐field range in 2D layered van der Waals materials. Furthermore, future prospects in this promising but emerging field are featured on the basis of its peculiar applications. This review article will stimulate the scientific community to explore other hyperbolic materials and structures in order to develop optical technologies with novel functionalities and further improve the understanding of the exotic photonic phenomena.
