Hierarchical laser-induced periodic surface structures induced by femtosecond laser on the surface of a ZnO film

Shaojun Wang, Lan Jiang, Weina Han, Jie Hu, Xiaowei Li, Qingsong Wang, Yongfeng Lu

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3 Scopus citations

Abstract

We realize hierarchical laser-induced periodic surface structures (LIPSSs) on the surface of a ZnO thin film in a single step by the irradiation of femtosecond laser pulses. The structures are characterized by the high-spatial-frequency LIPSSs (HSFLs) formed on the abnormal bumped low-spatial-frequency LIPSSs (LSFLs). Localized electric-field enhancement based on the initially formed LSFLs is proposed as a potential mechanism for the formation of HSFLs. The simulation results through the finite-difference time-domain method show good agreement with experiments. Furthermore, the crucial role of the LSFLs in the formation of HSFLs is validated by an elaborate experimental design with preprocessed HSFLs.

Original languageEnglish (US)
Article number052703
JournalApplied Physics Express
Volume11
Issue number5
DOIs
Publication statusPublished - May 2018

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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