Enhanced absorption study of one-way absorber based on magnetophotonic crystal combined with graphene

Abstract

In this paper, a magnetophotonic crystal for enhanced absorption peak of one-way absorber is studied, in which two defect layers are introduced. The effects of magneto-optics and Tamm plasma polaritons are investigated. The optical properties of the novel photonic crystal with different periodic layer thicknesses and structures are shown in the wavelength range of 0.6–1.0 μm. Considering the large third-order nonlinearity and field localization, graphene is combined with the defect layer. Results showed that graphene can improve the absorption capacity of the absorber by 50%. Moreover, the influence of the relative position between graphene layer and magneto-optical layers on the absorption is further studied, which had found that this relative position can tune the absorption peak of the one-way absorber. Furthermore, the effect of incidence angle and the contour of electrical fields are also studied. Compared with the existing unidirectional devices, the structure has the advantages of small size, high efficiency, wide bandwidth and easy photoelectric integration. This work provides a new method for controllable perfect one-way absorber design in infrared wavelength range.