The observation of a transient surface morphology in the femtosecond laser ablation process by using the soft x-ray laser probe

被引：1

作者：

Hasegawa, Noboru ^{[1
]}

Nishikino, Masaharu ^{[1
]}

Tomita, Takuro ^{[2
]}

Ohnishi, Naofumi ^{[3
]}

Ito, Atsushi M. ^{[4
]}

Eyama, Takashi ^{[2
]}

Kakimoto, Naoya ^{[2
]}

Idutsu, Rui ^{[2
]}

Minami, Yasuo ^{[5
]}

Baba, Motoyoshi ^{[6
]}

Faenov, Anatoly Y. ^{[7
]}

Inogamov, Nail A. ^{[8
]}

Kawachi, Tetsuya ^{[1
]}

Yamagiwa, Mitsuru ^{[1
]}

Suemoto, Tohru ^{[9
]}

机构：

[1] Japan Atom Energy Agcy, Xray Laser Applicat Grp, Quantum Beam Sci Ctr, Kizugawa, Kyoto 6190215, Japan

[2] Univ Tokushima, Dept Ecosyst Engn, Tokushima 7708506, Japan

[3] Tohoku Univ, Dept Aerosp Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

[4] Natl Inst Fus Sci, Dept Hel Plasma Res, Toki, Gifu 5095292, Japan

[5] Yokohama Natl Univ, Yokohama, Kanagawa 2408501, Japan

[6] Saitama Med Univ, Saitama 3500495, Japan

[7] Osaka Univ, Suita, Osaka 5650871, Japan

[8] Russian Acad Sci, Landau Inst Theoret Phys, Chernogolovka 142432, Moscow Region, Russia

[9] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

X-RAY LASERS AND COHERENT X-RAY SOURCES: DEVELOPMENT AND APPLICATIONS XI | 2015年 / 9589卷

关键词：

Femto-second laser ablation; ablation dynamics; soft x-ray laser; soft x-ray interferometer; pump and probe experiment; INTERFEROMETRY; PHASE;

D O I：

10.1117/12.2186744

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have improved a soft x-ray laser (SXRL) interferometer synchronized with a Ti: Sapphire laser pulse to observe the single-shot imaging of the nano-scaled structure dynamics of the laser induced materials. By the precise imaging optics and double time fiducial system having been installed, the lateral resolution on the sample surface and the precision of the temporal synchronization between the SXRL and Ti: Sapphire laser pulses were improved to be 700 nm and 2 ps, respectively. By using this system, the initial stage (t < 200 ps) of the ablation process of the Pt surface pumped by 80 fs Ti: Sapphire laser pulse was observed by the comparison between the soft x-ray reflective image and interferogram. We have succeeded in the direct observation of the unique ablation process around the ablation threshold such as the rapid increase of the surface roughness and surface vibration.

引用

页数：8

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