Enhancement of focusing properties of Bessel-like beam by metallic surface nanostructure

Chin Kai Chang, Rui Wen Hsu, Ding Zheng Lin

研究成果: Article同行評審

摘要

The focusing properties of a Bessel-like beam emitted from a circular slit surrounded by a surface groove (CSSG) were explored using experimental and numerical methods. The optical properties of the light emitted from the CSSG can be enhanced by using the scattered light from the surface groove. Furthermore, different modes of cylindrical surface plasmons in the circular slit are induced by different wavelengths of incident light, and beam shapes with a single spot and doughnut are created under illumination in the ultraviolet and visible regimes, respectively. A versatile beam shape is obtained from the CSSG structure.

原文English
文章編號072001
期刊Applied Physics Express
15
發行號7
DOIs
出版狀態Published - 2022 7月

All Science Journal Classification (ASJC) codes

  • 工程 (全部)
  • 物理與天文學 (全部)

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