Yuxiang Chen1,†,Fengyu Zhang2,4,†,Zhibo Dang1,Xiao He1,Chunxiong Luo2,4,Zhengchang Liu3,Pu Peng1,Yuchen Dai3,Yijing Huang1,Yu Li3,Zheyu Fang1,3,
Abstract:Chirality plays an important role in biological processes, and enantiomers often possess similar physical properties and different physiologic functions. In recent years, chiral detection of enantiomers become a popular topic. Plasmonic metasurfaces enhance weak inherent chiral effects of biomolecules, so they are used in chiral detection. Artificial intelligence algorithm makes a lot of contribution to many aspects of nanophotonics. Here, we propose a nanostructure design method based on reinforcement learning and devise chiral nanostructures to distinguish enantiomers. The algorithm finds out the metallic nanostructures with a sharp peak in circular dichroism spectra and emphasizes the frequency shifts caused by nearfield interaction of nanostructures and biomolecules. Our work inspires universal and efficient machine-learning methods for nanophotonic design.
Opto-Electron Sci 2, 220019 (2023) 
oes-2022-0019FangZheyu.pdf
