Tight focusing of fractional-order topological charge vector beams by cascading metamaterials and metalens.

Lan Ke, Yunyun Yang, Mingmin Zhu, Haomiao Zhou, Yi Chen, Ying Tian, Chenxia Li, Bo Fang, Zhi Hong, Xufeng Jing

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Article in Microsystems & nanoengineering, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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10 authors.

Lan Ke *The Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China.

Yunyun Yang *The College of Standardization, China Jiliang University, Hangzhou, PR China.

Mingmin ZhuThe College of Information Engineering, China Jiliang University, Hangzhou, China.

Haomiao ZhouThe College of Information Engineering, China Jiliang University, Hangzhou, China.

Yi ChenThe Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China.

Ying TianThe Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China.

Chenxia LiThe Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China.

Bo FangCollege of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, China.

Zhi HongThe College of Information Engineering, China Jiliang University, Hangzhou, China.

Xufeng JingThe College of Information Engineering, China Jiliang University, Hangzhou, China. jingxufeng@cjlu.edu.cn.

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No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vector beams have attracted widespread attention because of their unique optical properties; in particular, their combination with tight focusing can produce many interesting phenomena. The rise of 3D printing technology provides more possibilities for exploration. In this work, a cascading method involving a metamaterial and a metalens is used to generate a tightly focused field of vector beams in the terahertz band, which is prepared via 3D printing. As a proof-of-concept demonstration, a series of metamaterial modules capable of generating states of different orbital angular momentum are proposed by cascading with a metalens. The experimental results are in good agreement with the simulation results, fully verifying the feasibility of the scheme. The proposed design and fabrication strategy provides a new idea for the tight focusing of terahertz vector beams.

Identifiers

PMID39414812

DOI10.1038/s41378-024-00781-7

PMCPMC11484866

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