Nonlinear coherent perfect photon absorber in asymmetrical atom-nanowires coupling system

摘要

Coherent perfect absorption provides a method of light-controlling-light and has practical applications in optical communications.Recently,a cavity-based nonlinear perfect photon absorption extends the coherent perfect absorber (CPA) beyond the linear regime.As nanowire-based system is a more competitive candidate for full-optical device,we introduce a nonlinear CPA in the single two-level atom-nanowires coupling system in this work.Nonlinear input-output relations are derived analytically,and three contributions of atomic saturation nonlinearity are explicit.The consociation of optical nonlinearity and destructive interference makes it feasible to fabricate a nonlinear monoatomic CPA.Our results also indicate that a nonlinear system may work linearly even when the incoming lights are not weak any more.Our findings show promising applications in full-optical devices.