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

Chen，Yiqin1; Hu，Yueqiang1; Zhao，Jingyi2,3; Deng，Yunsheng4; Wang，Zhaolong1; Cheng，Xing5; Lei，Dangyuan6; Deng，Yongbo7; Duan，Huigao1

2020

10.1002/adfm.202000642

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

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.

inverse design near-field enhancement nonlinear optics plasmonic nanostructures topology optimization

SCI ; EI

英语

NI论文

其他

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000538154000007

WILEY-V C H VERLAG GMBH

20201608416271

Ion beams ; Topology ; Plasmonic nanoparticles ; Nonlinear optics ; Shape optimization ; Heart

Biological Materials and Tissue Engineering:461.2 ; Nonlinear Optics:741.1.1 ; Nanotechnology:761 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Optimization Techniques:921.5 ; High Energy Physics:932.1 ; Plasma Physics:932.3

MATERIALS SCIENCE

2-s2.0-85083047217

Scopus

1.State-Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,College of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082,China
2.State Key Laboratory for Mesoscopic Physics & Collaborative Innovation Center of Quantum Matter,Department of Physics,Peking University,Beijing,100871,China
3.Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong
4.Core Research Facilities,Southern University of Science and Technology,Shenzhen,518055,China
5.Department of Materials Science and Engineering,South University of Science and Technology of China,Shenzhen,No. 1088, Xueyuan Road,518055,China
6.Department of Materials Science and Engineering,City University of Hong Kong,Kowloon,83 Tat Chee Avenue,Hong Kong
7.State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics (CIOMP),Chinese Academy of Sciences,Changchun,130033,China

Chen，Yiqin,Hu，Yueqiang,Zhao，Jingyi,et al. Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement[J]. ADVANCED FUNCTIONAL MATERIALS,2020,30(23).

Chen，Yiqin.,Hu，Yueqiang.,Zhao，Jingyi.,Deng，Yunsheng.,Wang，Zhaolong.,...&Duan，Huigao.(2020).Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement.ADVANCED FUNCTIONAL MATERIALS,30(23).

Chen，Yiqin,et al."Topology Optimization-Based Inverse Design of Plasmonic Nanodimer with Maximum Near-Field Enhancement".ADVANCED FUNCTIONAL MATERIALS 30.23(2020).