基于石墨烯和一维光子晶体复合结构实现可见光全波段吸收器

Design of Absorber at Visible Frequencies Based on Compound Structure of One-dimensional Photonic Crystal and Graphene

为了实现可见光全波段光波吸收器,设计了石墨烯和一维光子晶体的复合结构。用修正的传输矩阵法研究它的传输特性。通过参数的优化和设计级联结构,在正入射条件下该结构在整个可见光波段除两个个别频率吸收率为0.7和0.66外,其余吸收率均达到0.88。结构的吸收还具有对入射角度不敏感的特征。

In order to achieve an optical absorber working in the whole visible frequencies,we design a one-dimensional photonic crystal embedded by graphene layers.We study its propagation characteristic through the modified transfer matrix method.Through the parameter optimization and cascade structures,the structure can achieve the absorption rate 0.88 in the whole visible frequencies except for two special frequencies on normal incidence.The absorber is also found to be insensitive to the incidence angle.