Ablation area quasiperiodic oscillations in semiconductors with femtosecond laser double-pulse delay

Xin Li, Cong Li, Lan Jiang, Xuesong Shi, Ning Zhang, Yongfeng Lu

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

A surprising repeatable phenomenon regarding semiconductor ablation area changes has been discovered. Irradiated by femtosecond double pulses, the ablation area quasiperiodically oscillates as the pulse delay increases from 0 to 1 ps at a material-dependent fluence range. In contrast, the ablation area monotonically decreases as the pulse delay increases beyond 1 ps or if the total fluence increases close to or beyond the single-shot threshold. Similar unexpected patterns of area quasiperiodic oscillations with the double-pulse delay are observed in various semiconductors, including Ge, Si, GaAs, and ZnO. The comparison study shows the same phenomenon in Au-plated ZnO. Yet, its oscillation periods are shorter and more stable than those in bulk ZnO, which implies that the localized carrier density is the key factor in oscillation periods.

Original languageEnglish (US)
Pages (from-to)2382-2385
Number of pages4
JournalOptics Letters
Volume39
Issue number8
DOIs
StatePublished - Apr 15 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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