Doping transition metal ions as a method for enhancement of ablation rate in femtosecond laser irradiation of silicate glass

Juqiang Fang, Lan Jiang, Qiang Cao, Yanping Yuan, Liangti Qu, Ji'an Duan, Yongfeng Lu

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We present a doping method to improve the femtosecond laser ablation rate and promote ablation selectivity. Doping transition metal ions, Co2+ or Cu2+, in silicate glass apparently change absorption spectroscopy and induce resonant absorption at wavelengths of 600 and 800 nm, respectively. Comparing with femtosecond laser processing of the same glass without doping, we find that the threshold fluence decreases and the ablation rate increases in resonant absorption in doped silicate glass. Resonant absorption effectively increases multiphoton ionization for seed-free electron generation, which in turn enhances avalanche ionization.

Original languageEnglish (US)
Article number121402
JournalChinese Optics Letters
Issue number12
Publication statusPublished - Dec 10 2014


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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