Multiwavelength absorption switching based on the metal-dielectric-metal multilayer Kerr metamaterial

Abstract

In this paper, quintuple-band absorption switch has been demonstrated and studied. Finite-difference time-domain simulations indicate the absorption originated from localized surface plasmon polaritons and Fabry–Perot resonance effect. Quintuple-band plasmonic perfect absorption with maximum absorption of 99.8%, 86.2%, 99.9%, 95.8%, and 97.8% at the resonance wavelength of 635 nm, 694 nm, 915 nm, 1125 nm, and 1345 nm, respectively. We calculate the sensitivity of the five modes is about s 1 = 74 n m / R I U , s 2 = 376 n m / R I U , s 3 = 518 n m / R I U , s 4 = 512 n m / R I U , and s 5 = 7 98 n m / R I U (RIU is the refractive index unit). Angle and polarization independent of the quintuple-band absorption are also investigated. Moreover, by adjusting the pump light on and off, absorption ratios of 3.9, 10.3, 3.8, 3.4, and 6.8 have been achieved. Besides, the proposed multiwavelength absorption switching has excellent absorption stability and polarization tolerance. We believe the proposed structure can find potential applications in the fields of multiband sensor and all-optical modulation.