Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement

doi:10.1002/adfm.202000642

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	Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement
	Y. Q. Chen,Y. Q. Hu,J. Y. Zhao,Y. S. Deng,Z. L. Wang,X. Cheng,D. Y. Lei,Y. B. Deng and H. G. Duan
	2020
发表期刊	Advanced Functional Materials
ISSN	1616-301X
卷号	30 期号:23 页码:8
摘要	The near-field enhancement factor is one of the most significant parameters to evaluate the performance of plasmonic nanostructures. Numerous efforts have been made to maximize the enhancement factor through optimizing the size, shape, and spatial arrangement of metallic nanostructures with simple geometries, such as disk, triangle, and rod. This work implements topology optimization to inversely design a metallic nanoparticle dimer with the goal of optimizing the near-field enhancement factor in its sub-10 nm gap. By optimizing the material layout within a given design space, the topology optimization algorithm results in a plasmonic nanodimer of two heart-shaped particles having both convex and concave features. Full-wave electromagnetic analysis reveals that the largest near-field enhancement in the heart-shaped nanoparticle dimer is originated from the greatest concentration of surface charges at the nano-heart apex. Inversely designed heart-, bowtie-, and disk-shaped nanodimers are fabricated by using focused helium ion beam milling with a "sketch and peel" strategy, and their near-field enhancement performances are characterized with nonlinear optical spectroscopies at the single-particle level. Indeed, the heart-shaped nanodimer exhibits much stronger signal intensities than the other two structures. The present work corroborates the validity and effectiveness of topology optimization-based inverse design in achieving desired plasmonic functionalities.
DOI	10.1002/adfm.202000642
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收录类别	SCI ; EI
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/181722/64971
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	Y. Q. Chen,Y. Q. Hu,J. Y. Zhao,Y. S. Deng,Z. L. Wang,X. Cheng,D. Y. Lei,Y. B. Deng and H. G. Duan. Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement[J]. Advanced Functional Materials,2020,30(23):8.
APA	Y. Q. Chen,Y. Q. Hu,J. Y. Zhao,Y. S. Deng,Z. L. Wang,X. Cheng,D. Y. Lei,Y. B. Deng and H. G. Duan.(2020).Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement.Advanced Functional Materials,30(23),8.
MLA	Y. Q. Chen,Y. Q. Hu,J. Y. Zhao,Y. S. Deng,Z. L. Wang,X. Cheng,D. Y. Lei,Y. B. Deng and H. G. Duan."Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement".Advanced Functional Materials 30.23(2020):8.

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