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Multiwavelength metalens by spatial multiplexing at visible wavelengths
Journal of Optics ( IF 2.1 ) Pub Date : 2021-06-07 , DOI: 10.1088/2040-8986/ac01b2
Sangwon Baek , Jae Yong Park , Jong-Lam Lee

We theoretically demonstrate a multiwavelength metalens that operates concurrently at three visible wavelengths (λ = 400, 600, and 800 nm). Multiwavelength metalenses are designed by a simple integration of metalens components by a spatial interleaving method (SIM) or by a symmetric linear array method (SLAM). The designed metalenses focus light to the same focal distance at three visible wavelengths with near diffraction-limited full width at half-maximum. At wavelengths of 400, 600, and 800 nm, the SIM metalens had focusing efficiencies of 32.6%, 43.6%, and 51.7%, respectively, and the SLAM metalens had focusing efficiencies of 35.6%, 43.8%, and 56.4%, respectively. These methods can provide a simple guideline to increase the operating wavelengths of metalenses.



中文翻译:

通过可见波长空间复用的多波长元透镜

我们理论上展示了一种多波长超透镜,它可以在三个可见波长(λ = 400、600和 800 nm)下同时运行。多波长超透镜是通过空间交织方法 (SIM) 或对称线性阵列方法 (SLAM) 对超透镜组件进行简单集成而设计的。设计的超透镜在三个可见波长处将光聚焦到相同的焦距,在半最大值处具有接近衍射极限的全宽。在400、600和800 nm波长下,SIM超透镜的聚焦效率分别为32.6%、43.6%和51.7%,SLAM超透镜的聚焦效率分别为35.6%、43.8%和56.4%。这些方法可以为增加超透镜的工作波长提供简单的指导。

更新日期:2021-06-07
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