Formation mechanisms of sub-wavelength ripples during femtosecond laser pulse train processing of dielectrics

Yanping Yuan, Lan Jiang, Xin Li, Cong Wang, Hai Xiao, Yongfeng Lu, Hailung Tsai

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

A new model is proposed to investigate femtosecond laser pulse train processing of dielectrics by including the laser wave properties in the photon particle properties based plasma model. In the case studies, the pulse duration is 50fs and the pulse delays are 0, 25, 50 and 75fs. Both the laser waveparticle duality and transient localized changes of material properties are considered in the proposed model, and the formation mechanism of sub-wavelength ripples is revealed. This study shows that the interference between surface plasmons and laser field plays a key role in the formation of sub-wavelength ripples for which the excitation of surface plasmons is necessary. The predicted period of sub-wavelength ripples is in agreement with the experiments.

Original languageEnglish (US)
Article number175301
JournalJournal of Physics D: Applied Physics
Volume45
Issue number17
DOIs
StatePublished - May 2 2012

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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