レーザーアブレーション機構解明のためのナノ秒形態観察・分光システムと解析法の確立

建立纳秒形貌观察/光谱系统及分析方法，阐明激光烧蚀机理

• 批准号: 07554063
• 负责人: MASUHARA Hiroshi
• 金额: $ 2.18万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07554063/
• 关键词: Laser Ablation; Time-resolved Interferometic Imaging; Time-resolved Spectroscopy; Condensed Organic Matters; Cyclic Multiphotonic Absorption; Photochemical Ablation; Photothermal Ablation; ナノ秒干渉出像計測; ナノ秒写真観察; 高分子フィルム; 高密度励起; レーザー誘起膨張; 時間分解マッピン

Photophysical and photochemical phenomena due to interactions of materials with light have received much attention and the 21st century is considered to be "Century of Light". We have devoted our efforts to the studies on organic materials including films, microcrystalline powders, polymer microspheres, and so on by ultrafast spectroscopy, microspectroscopy, photoreaction, and optical manipulation, during which we found that materials often undergo morphological changes due to high intensity laser excitation. This morphological dynamics is very interesting and important not only from photophysical and photochemical viewpoints but also for elucidating the dynamic aspects of structures and properties of materials.In the present work, we have developed nanosecond interferometry by combining Michelson interferometry with nanosecond excitation and probe lasers. The spatial and temporal resolutions of our system are 20 nm and 10 ns, respectively. Morphological dynamics revealed by the interferometry is compared with time-resolved absorption and fluorescence spectroscopic data and considered in detail, which is opening a new stage of molecular photoscience.Development of a new methodologyEstablishment of photothermal ablation mechanism by "cyclic multiphotonic absorption"Establishment of photochemical ablation mechanismExpansion/contraction dynamics of polymer filmPhotodecomposition reaction and etching dynamics of polymers

由于材料与光的相互作用引起的光学和光化学现象已引起了很多关注，而21世纪被认为是“光的世纪”。我们将努力致力于对有机材料的研究，包括膜，微晶粉，聚合物微球等，通过超快光谱，微光谱，光电反应和光学操纵，在此期间，我们发现我们发现由于高强度激发而经常由于高强度激发而经常发生形态学变化。这种形态学动力学不仅非常有趣且重要，不仅是从光物理和光化学观点来看，而且还阐明了材料的结构和特性的动态方面。在当前的工作中，我们通过将米歇尔森干预仪与纳米辅助激发和探测激发剂结合使用，从而开发了纳秒干涉测量法。我们系统的空间和时间分辨率分别为20 nm和10 ns。将干涉仪揭示的形态动力学与时间分辨的吸收和荧光光谱数据进行了比较，并详细考虑了，这正在开放分子照片的新阶段。开发新方法的新方法阐明光热消融机制的新方法是通过“循环多动力学机制的建立”的“策略”机制的建立。聚合物的薄膜化反应和蚀刻动力学

项目成果

LS.Bennett,T.Lippert,H.Furutani,H.Fukumura,and H.Masuhara: "Laser-induced Microexplosions of a Photosensitive Polymer" Appl.Phys.A,. Vol.63. 327-332 (1996)

LS.Bennett、T.Lippert、H.Furutani、H.Fukumura 和 H.Masuhara：“光敏聚合物的激光诱导微爆炸”Appl.Phys.A，。

K.Hatanaka, M.Kawas, Y.Tsuboi, H.Fukumura, H.Masuhara: "Switching from photochemical to photothermal mechanism in laser ablation of benezene solutions" J.Appl.Phys.vol.82. 5799-5806 (1997)

K.Hatanaka、M.Kawas、Y.Tsuboi、H.Fukumura、H.Masuhara：“苯溶液激光烧蚀中从光化学机制转变为光热机制”J.Appl.Phys.vol.82。

H.Furutani,H.Fukumura,and H.Masuhara: "Photothermal Transient Expansion and Contracion Dynamics of Polymer Films by Nanosecond Interferometry" J.Phys.Chem.,. Vol.100 No.17. 6871-6875 (1996)

H.Furutani、H.Fukumura 和 H.Masuhara：“通过纳秒干涉测量法研究聚合物薄膜的光热瞬态膨胀和收缩动力学”J.Phys.Chem.,。

H.Fukumura,Y.Kohji,H.Masuhara: "Laser Implantation jof Fluorescent Molecules into Polymer Films" Applied Surface Science. (in press). (1995)

H.Fukumura、Y.Kohji、H.Masuhara：“将荧光分子激光植入聚合物薄膜”应用表面科学。

Yasuyuki Tsuboi, Shin-ichi Sakashita, Koji Hatanaka, Hiroshi Fukumura, and Hiroshi Masuhara: "Photothermal ablation of polystirene film by 248 nm excimer laser irradiation : a mechanistic study by time-resolved measurements" Laser Chem.16. 167 (1996)

Yasuyuki Tsuboi、Shin-ichi Sakashita、Koji Hatanaka、Hiroshi Fukumura 和 Hiroshi Masuhara：“248 nm 准分子激光照射对聚苯乙烯薄膜的光热烧蚀：通过时间分辨测量进行的机理研究”Laser Chem.16。