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Zhu, W.W., Fang, X.S., Li, D.T., et al. (2018) Simultaneous Observation of a Topological Edge State and Exceptional Point in an Open and Non-Hermitian Acoustic System. Physical Review Letters, 121, Article 124501.
https://doi.org/10.1103/PhysRevLett.121.124501

has been cited by the following article:

• TITLE: Coherent Perfect Absorption in Higher Order Systems

  AUTHORS: Mengjun Fan, Linxue Fu, Yaqiong Ding, Xinming Fu

  KEYWORDS: Exceptional Point, PT Symmetry, Non-Hermitian System, Coherent Perfect Absorption

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.11 No.3, March 27, 2023

  ABSTRACT: We investigate the phenomenon of coherent perfect absorption in a high-order system with three passive resonators coupled to a super-surface to form this three-state coherent perfect absorber. The effective parity time (PT) symmetry in the passive system has received much attention, and in this open three-state PT symmetric system, the incident wave is used as the effective gain instead of balancing the material gain and loss. We analyze the variation of coherent perfect absorption of this system with the coupling coefficient of the system by simulation.