title: Scalable Fabrication of Quasi-Three-Dimensional Chiral Plasmonic Oligomers Based on Stepwise Colloid Sphere Lithography Technology.
abstract: We report a simple and scalable method for the fabrication of spiral-type chiral plasmonic oligomers based on the stepwise colloid sphere lithography technology. Through carefully adjusting the azimuthal angle Φ of polystyrene (PS) sphere array monolayer and the deposition thickness k n , the chiral plasmonic oligomers composed of four achiral particles can be successfully fabricated on a desired substrate. And their chiral sign, i.e., left-hand or right-hand, is dependent on the anticlockwise or clockwise deposition sequence of the achiral particles. The measured results show a large chiroptical resonance in the visible region, and this resonance can be easily adjusted by using different sizes of PS spheres. Our in-depth theoretical and experimental researches further reveal that the obtained chiral plasmonic oligomers are indeed a kind of quasi-three-dimensional chiral nanostructures, which own a three-dimensional geometrical morphology, but with nonreciprocity chiroptical effect. The ease and scalability (>1 cm(2)) of the fabrication method make chiral plasmonic oligomers promising candidates for many applications, such as chiral biosensor and catalysis.
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China.|College of Science, China Three Gorges University, Yichang, 443002, China.
authors.forename: Shiwei
authors.initials: S
authors.lastname: Xie
authors.affiliation: Department of Physics, Key laboratory of Micro- and Nano-Photonic Structures (Ministry of Education) and State Key Laboratory of Surface Physics, Fudan University, Shanghai, 200433, China.
authors.forename: Jinzhe
authors.initials: J
authors.lastname: Yang
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Xiao
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China. jian-hun.123@163.com.|Key Laboratory for High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, 610064, China. jian-hun.123@163.com.
authors.forename: Yidong
authors.initials: Y
authors.lastname: Hou
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China.|Key Laboratory for High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, 610064, China.
authors.forename: Jinglei
authors.initials: J
authors.lastname: Du
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Pang
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China.
authors.forename: Xie
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Physics, Sichuan University, Chengdu, 610064, China. gaofuhua@scu.edu.cn.|Key Laboratory for High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, 610064, China. gaofuhua@scu.edu.cn.
authors.forename: Fuhua
authors.initials: F
authors.lastname: Gao