Impact of the geometry of the excitation structure on optical skyrmion

Author:

Chen Jiuye1,Ji Boyu12ORCID,Lang Peng12,Zhang Ye1,Lin Jingquan12

Affiliation:

1. Changchun University of Science and Technology

2. Zhongshan Institute of Changchun University of Science and Technology

Abstract

Optical skyrmions have attracted great attention for the potential applications in novel information storage and communication. It is of great significance to get insight into the generation of optical skyrmions by surface waves. Here, we have paid greater emphasis on the influence of the geometry of the coupling structure on the formation of optical skyrmions. Optical skyrmions are constructed from the superposition of the interfering surface plasmons excited by polygon trenches on Ag film. The results show the field texture of optical skyrmions is mainly determined by the excitation structure, with distinct properties revealed with various closed and non-closed geometries. Moreover, the ratio between the electric field strengths of the optical skyrmions can be larger than 4 between the optimized and unoptimized coupling structures. The pattern of the optical skyrmion shows a strong dependence on the excitation structure, implying the significant role in skyrmion topology it plays.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Department of Science and Technology of Jilin Province

111 Project

Education Department of Jilin Province

Recruitment Project of Science and Technology Youth Talents of Jilin Province

Jilin Provincial Key Laboratory of Ultrafast and Extreme Ultraviolet Optics

Chongqing Municipal Science and Technology Bureau

the Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing, Changchun University of Science and Technology

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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