Author(s)

Mengjun Fan^*, Linxue Fu, Yaqiong Ding, Xinming Fu

College of Science, University of Shanghai for Science and Technology, Shanghai, China.

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.

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

Fan, M. , Fu, L. , Ding, Y. and Fu, X. (2023) Coherent Perfect Absorption in Higher Order Systems. Journal of Applied Mathematics and Physics, 11, 737-745. doi: 10.4236/jamp.2023.113049.