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- 羽田 真毅
- 科学技術振興機構 さきがけ 東京工業大学 応用セラミックス研究所
書誌事項
- タイトル別名
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- Femtosecond Time-Resolved Electron Diffraction: Applications for Laser Melting and Ablation
- フェムトビョウ ジカン ブンカイ デンシセン カイセツホウ : ユウカイ オヨビ アブレーション ゲンショウ カンソク エ ノ オウヨウ
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説明
Melting and ablation with an ultrashort laser pulse have been widely used for a variety of applications. The mechanisms of melting and ablation are strongly dependent on the material and photoexcitation levels. Using high peak power laser fluences induces nonthermal processes that involve nonthermal melting, cold ablation and plasma formation; however, thermal related processes are dominant at relatively a low laser fluence. In this paper, we summarize the laser melting and ablation processes from the viewpoint of time-resolved structural studies and introduce the development of a femtosecond timeresolved electron diffraction setup. We also show a time-resolved electron diffraction experiment to study the evolution of the ablation process that follows femtosecond 400-nm laser excitation in crystalline potassium iodide. Our results reveal fast electronic and localized structural changes that lead to the ejection of particles, reflecting the very nature of the strong repulsive forces at play.
収録刊行物
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- レーザー研究
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レーザー研究 43 (3), 149-, 2015
一般社団法人 レーザー学会
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詳細情報 詳細情報について
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- CRID
- 1391131406290492928
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- NII論文ID
- 130007957101
- 40020406824
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- NII書誌ID
- AN00255326
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- ISSN
- 13496603
- 03870200
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- NDL書誌ID
- 026272054
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
