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.
|ジャーナル||Materials Science Forum|
|出版ステータス||出版済み - 1月 29 2008|
|イベント||2nd International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena, ESHP-2 - Kumamoto, 日本|
継続期間: 3月 6 2007 → 3月 9 2007
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