红外与激光工程, 2020, 49 (6): 20200048, 网络出版: 2020-09-21  

近红外波段偏振无关型反射超透镜的设计 下载: 542次

Design of polarization-independent reflective metalens in near infrared waveband
作者单位
1 长春理工大学 光电工程学院,吉林 长春 130022
2 长春理工大学 光电测控与光信息传输技术教育部重点实验室,吉林 长春 130022
3 吉林省先进光学设计与制造高校重点实验室,吉林 长春 130022
摘要
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。
Abstract
Metalens has received extensive concern in recent years. Design of a polarization-independent reflective metalens was proposed baesd on Au in infrared waveband. MgF2was 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.

张玉慧, 杨博伟, 李轶庭, 赵元埴, 付跃刚. 近红外波段偏振无关型反射超透镜的设计[J]. 红外与激光工程, 2020, 49(6): 20200048. Zhang Yuhui, Yang Bowei, Li Yiting, Zhao Yuanzhi, Fu Yuegang. Design of polarization-independent reflective metalens in near infrared waveband[J]. Infrared and Laser Engineering, 2020, 49(6): 20200048.

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