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近些年,超透镜受到了广泛关注.文中提出了一种基于金材料的近红外波段偏振无关型反射超透镜,该超透镜采用MgF2材料作为电介质层,利用FDTD软件实现仿真设计.仿真结果表明:超透镜在不同偏振光入射的情况下具有相同的聚焦效果,入射波长在700～850 nm的范围内,具有较好的聚焦效果.入射波长在750～800 nm范围内单焦点聚焦效果最好.当入射波长为800 nm,该超透镜可以分别实现单焦点和多焦点聚焦,其单焦点、双焦点和三个焦点的焦距分别为9.6、6.6和4.7 μm.可以利用该超透镜的特点实现不同的聚焦要求.“,”Metalens has received extensive concern in recent years.Design of a polarization-independent reflective metalens was proposed baesd on Au in infrared waveband.MgF2 was chosen as the dielectric spacer of the metalens.All simulations were carried out by using the finite-difference time-domain(FDTD) software.Results show that the proposed metalens has the same effect on different polarized light and can work well in the range of 700-850 nm and one-focus works best in the range of 750-800 nm.When the incidence wavelength is chosen as 800 nm,the proposed metalens can also work well for one-focus and multi-focus.At that time,the focal length of one focus,dual focus and three focus are 9.6,6.6 and 4.7 μm,respectively.Different focus requirements can be realized according to the characteristics of the metalens.