High-speed photographic observation of shock-pressure pulses in water induced by laser energy absorption at roughened surface

Motonao Nakahara, Kunihito Nagayama, Takashi Kajiwara, Takashi Nishiyama

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

Absorption enhancement of laser energy at roughened surface was discovered by our group years ago. Laser ablation threshold apparently decreases by intentional roughening of the surface. Another important condition of threshold reduction is found for transparent material surface, if the pulse laser beam is irradiated from the rear side through the transparent plate. Several examples of the shock pulse induced in water and in air by pulse laser ablation of ground glass, roughened PMMA plates and fiber has been observed in detail by high-speed photography. Simple preliminary experiments to study the physical mechanism of enhanced absorption of laser energy have also been planned and demonstrated.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalMaterials Science Forum
Volume566
Publication statusPublished - Jan 29 2008
Event2nd International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena, ESHP-2 - Kumamoto, Japan
Duration: Mar 6 2007Mar 9 2007

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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