亚波长光栅的偏振闪耀特性

 使用琼斯矩阵的方法推导了连续结构亚波长光栅的衍射方程，给出了光栅衍射效率表达式，对偏振特性与衍射特性进行了研究。发现连续结构亚波长光栅仅存在３个衍射级，总衍射效率为100%，且衍射效率可在衍射级间任意分配，0级的偏振态与入射光的偏振态相同，±1级衍射光偏振态与入射光无关，－1级为左旋圆偏振光，＋1级为右旋圆偏振光。通过设置入射光偏振态与光栅相位延迟等参数，可使光栅具有闪耀特性，据此可用于设计高效偏振光分束器和偏振光开关。

Polarization and blazing characteristics of subwavelength dielectric polarization gratings

The diffraction equations for continuous subwavelength dielectric polarization gratings are derived using Jones matrix approach. The polarization characteristics and diffraction efficiencies are also discussed. The results show that, by setting up the parameters such as the incident light polarization state and grating phase delay, only three diffraction orders with an arbitrary diffraction efficiencies distribution exist in continuous subwavelength dielectric polarization grating, and the total efficiency of the diffraction orders is always 100%. Moreover, the polarization state of zero order wave is identical to the incident wave. Ｔhe polarization state of +１ order is a right circularly polarized wave and the polarization state of －１ order is a left circularly polarized wave, bo