Damage inside borosilicate glass by a single picosecond laser pulse

Weibo Cheng, Jan Willem Pieterse, Rongguang Liang

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate damage inside the bulk of borosilicate glass by a single shot of IR picosecond laser pulse both experimentally and numerically. In our experiments, bulk damage of borosilicate glass with aspect ratio of about 1:10 is generated. The shape and size of the damage site are shown to correspond to an electron cloud with density of about 1020 cm−3 . The underlying mechanism of electron generation by multiphoton ionization and avalanche ionization is numerically investigated. The multiphoton ionization rate and avalanche ionization rate are determined by fitting experimental results. The relative role of multiphoton ionization and avalanche ionization are numerically studied and the percentage of electron contribution from each ionization channel is determined.

Original languageEnglish (US)
Article number553
JournalMicromachines
Volume12
Issue number5
DOIs
StatePublished - May 2021

Keywords

  • Laser–matter interaction
  • Plasma dynamics
  • Ultrashort pulse laser processing

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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