圆偏振光在含石墨烯一维缺陷光子晶体的传输

Transportation properties of circularly polarized light in one-dimensional defective photonic crystal containing graphene

利用4×4传输矩阵法,研究了外加磁场情况下圆偏振光在含石墨烯一维缺陷光子晶体的光学传输特性。结果表明,石墨烯诱导禁带和布拉格禁带中都出现了不同程度的缺陷模。左旋圆偏振光和右旋圆偏振光的缺陷模式随着磁场的增强而逐渐分离,并具有非互易性。通过改变外加磁场,可以实现对缺陷模偏振态的调控。研究结果可为在太赫兹频段设计新型光隔离器和光学滤波器件提供理论依据。

The optical properties of circularly polarized light passing through one-dimensional defective photonic crystals containing graphene have been studied by means of ns transmission matrix method.It is found that there are defect modes in graphene induced photonic band gap and Bragg band gap.The defect modes of left-handed circular polarized light and right-handed circular polarized light will be separated gradually with the increase of magnetic field and show non-reciprocity.Moreover,the polarization state of defect mode can be controlled by changing the applied magnetic field.The research results can provide a theoretical basis for the design of a new type of optical isolator and optical filter in terahertz frequency band.