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

Chin Kai Chang, Rui Wen Hsu, Ding Zheng Lin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Article number072001
JournalApplied Physics Express
Issue number7
Publication statusPublished - 2022 Jul

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


Dive into the research topics of 'Enhancement of focusing properties of Bessel-like beam by metallic surface nanostructure'. Together they form a unique fingerprint.

Cite this