Magnetic response at visible and near-infrared frequencies from black phosphorus sheet arrays

Abstract

During the past decades, there has been great interest in studying the magneto-optical (MO) effects because of their potential applications for optical readout of magnetically stored information in erasable video and audio disks [1]. In general, the MO effects are caused by the interaction of light with magnetized materials or nonmagnetic media in the presence of the external magnetic field We study theoretically optical properties of black phosphorus (BP) sheet arrays being embedded in the dielectric multilayer structure using 4×4 transfer-matrix method. This two dimensional material is taken into account to Maxwell boundary condition, so the 4×4 transfer-matrix method is improved and generalized. It is found that the dielectric multilayer structures containing BP sheet arrays can exhibit rich optical properties. In some frequency regions, strong anisotropy appears for the scattering and absorption of polarized waves. Thus, they can be used as the selective absorption materials for two kinds of polarized wave. In contrast, in some visible and near-infrared frequency regions, low absorption and strong magnetic response have been observed. This means that they can be also used as good magnetic response materials at visible and near-infrared frequencies. Our results could find applications in various control of polarized waves [2].