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.