Liquid atomization induced by pulse laser reflection underneath liquid surface

Yuji Utsunomiya, Takashi Kajiwara, Takashi Nishiyama, Kunihito Nagayama, Shiro Kubota, Motonao Nakahara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We observed a novel effect of pulse laser reflection at the interface between transparent materials with different refractive indices. The electric field intensity doubles when a laser beam is completely reflected from a material with a higher refractive index to a material with a lower index. This effect appreciably reduces pulse laser ablation threshold of transparent materials. We performed experiments to observe the entire ablation process for laser incidence on the water-air interface using pulse laser shadowgraphy with high-resolution film; the minimum laser fluence for laser ablation at the water-air interface was approximately 12-16 J/cm2. We confirmed that this laser ablation occurs only when the laser beam is incident on the water-air interface from water. Many slender liquid ligaments extend like a milk crown and seem to be atomized at the tip. Their detailed structures can be resolved only by pulse laser photography using high-resolution film.

Original languageEnglish
Pages (from-to)525011-525015
Number of pages5
JournalJapanese journal of applied physics
Volume48
Issue number5
DOIs
Publication statusPublished - May 1 2009

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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