Inverse Design of 3D-Printable Metalenses with Complementary Dispersion for Terahertz Imaging

IF 6.5 1区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Mo Chen, Ka Fai Chan, Alec M. Hammond, Chi-Hou Chan, Steven G. Johnson
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引用次数: 0

Abstract

This study formulates a volumetric inverse-design methodology to generate a pair of complementary focusing metalenses for terahertz imaging: the two lenses exhibit equal and opposite shifts in focal length with frequency. An asymmetry arises, where we find a focal length that decreases with frequency to be more challenging to achieve (without material dispersion) given fabrication constraints, but it is still possible. We employ topology optimization, coupled with manufacturing constraints, to explore fully freeform designs compatible with 3D printing. Formulating an optimization problem that quantifies the goal of maximal complementary focal shifts while remaining differentiable and tractable requires a carefully selected sequence of constraints and approximations.

Abstract Image

用于太赫兹成像的互补色散3d打印超透镜的逆向设计
本研究制定了一种体积反设计方法,以产生一对互补聚焦超透镜用于太赫兹成像:两个透镜在焦距与频率上表现出相等和相反的位移。出现了不对称,我们发现焦距随频率减小在制造限制下(没有材料色散)更难实现,但它仍然是可能的。我们采用拓扑优化,再加上制造限制,探索与3D打印兼容的完全自由形状设计。制定一个优化问题,量化最大互补焦点位移的目标,同时保持可微分和可处理,需要仔细选择一系列约束和近似。
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来源期刊
ACS Photonics
ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
11.90
自引率
5.70%
发文量
438
审稿时长
2.3 months
期刊介绍: Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.
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