Subwavelength ripples adjustment based on electron dynamics control by using shaped ultrafast laser pulse trains

Lan Jiang, Xuesong Shi, Xin Li, Yanping Yuan, Cong Wang, Yongfeng Lu

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

This study reveals that the periods, ablation areas and orientations of periodic surface structures (ripples) in fused silica can be adjusted by using designed femtosecond (fs) laser pulse trains to control transient localized electron dynamics and corresponding material properties. By increasing the pulse dlays from 0 to 100fs, the ripple periods are changed from ~550nm to ~255nm and the orientation is rotated by 90°. The nearwavelength/subwavelength ripple periods are close to the fundamental/second-harmonic wavelengths in fused silica respectively. The subsequent subpulse of the train significantly impacts free electron distributions generated by the previous subpulse(s), which might influence the formation mechanism of ripples and the surface morphology.

Original languageEnglish (US)
Pages (from-to)21505-21511
Number of pages7
JournalOptics Express
Volume20
Issue number19
DOIs
StatePublished - Sep 10 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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