High-Efficiency Achromatic Metalens Topologically Optimized in the Visible

doi:10.3390/nano13050890

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	High-Efficiency Achromatic Metalens Topologically Optimized in the Visible
	L. J. Zhang, C. M. Wang, Y. P. Wei, Y. Lin, Y. M. Han and Y. B. Deng
	2023
发表期刊	Nanomaterials
卷号	13 期号:5 页码:10
摘要	Metalens, composed of arrays of nano-posts, is an ultrathin planar optical element used for constructing compact optical systems which can achieve high-performance optical imaging by wavefront modulating. However, the existing achromatic metalenses for circular polarization possess the problem of low focal efficiency, which is caused by the low polarization conversion efficiencies of the nano-posts. This problem hinders the practical application of the metalens. Topology optimization is an optimization-based design method that can effectively extend the degree of design freedom, allowing the phases and polarization conversion efficiencies of the nano-posts to be taken into account simultaneously in the optimization procedures. Therefore, it is used to find geometrical configurations of the nano-posts with suitable phase dispersions and maximized polarization conversion efficiencies. An achromatic metalens has a diameter of 40 mu m. The average focal efficiency of this metalens is 53% in the spectrum of 531 nm to 780 nm by simulation, which is higher than the previously reported achromatic metalenses with average efficiencies of 20 similar to 36%. The result shows that the introduced method can effectively improve the focal efficiency of the broadband achromatic metalens.
DOI	10.3390/nano13050890
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收录类别	sci
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68185
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	L. J. Zhang, C. M. Wang, Y. P. Wei, Y. Lin, Y. M. Han and Y. B. Deng. High-Efficiency Achromatic Metalens Topologically Optimized in the Visible[J]. Nanomaterials,2023,13(5):10.
APA	L. J. Zhang, C. M. Wang, Y. P. Wei, Y. Lin, Y. M. Han and Y. B. Deng.(2023).High-Efficiency Achromatic Metalens Topologically Optimized in the Visible.Nanomaterials,13(5),10.
MLA	L. J. Zhang, C. M. Wang, Y. P. Wei, Y. Lin, Y. M. Han and Y. B. Deng."High-Efficiency Achromatic Metalens Topologically Optimized in the Visible".Nanomaterials 13.5(2023):10.

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